In children's shoe sizing, Y stands for Youth — indicating a shoe made for older children aged approximately 7–14 years. B stands for Boys width — a standard-width fitting used in US sizing. M stands for Medium width — the standard width for most shoes, equivalent to B width. A 5Y shoe fits a foot length of approximately 22–23 cm; a 7Y fits approximately 24–25 cm; an 8Y fits approximately 25–26 cm. These are US Youth sizes and do not correspond directly to Indian/UK sizes without conversion.
TABLE OF CONTENTS
- What does Y mean in shoe size?
- What does B mean in shoe size?
- What does M mean in shoe size?
- What does 5Y mean in shoe size?
- What does 6Y mean in shoe size?
- What does 7Y mean in shoe size — and what size is a 7Y?
- What does 8Y mean in shoe size?
- What does 7B mean in shoe size?
- What does 8B mean in shoe size?
- What does 8M mean in shoe size?
- Complete Y size to Indian/UK conversion chart
- Youth shoe size to age chart
- How to find the right youth shoe size for your child
- Frequently asked questions
INTRODUCTION
Online shoe shopping for older children comes with a problem that catches almost every parent off guard: the size labels use letters — 5Y, 6Y, 7B, 8M — that don't appear anywhere on Indian shoe boxes, and that don't map cleanly to the Indian/UK sizing system your child has been wearing for years.
A parent buying a child's first pair of sports shoes on a US platform, or an Indian e-commerce site that stocks global brands, can easily buy a size that is either significantly too small or too large — simply because they misread a letter.
Y, B, and M in shoe sizing mean three different things: a sizing system (Youth), a width category (Boys), and another width category (Medium). This guide untangles all three, converts every common Y size to Indian sizing and foot length, and tells you exactly what to buy for your child.
What Does Y Mean in Shoe Size?
Y stands for Youth.
Youth sizing (abbreviated Y) is a US-origin shoe sizing system for older children, typically covering ages 7 to 14 years. It begins where US Kids sizing ends — at approximately US Kids size 13 / UK size 13 (foot length 18.5–19 cm) — and continues upward through sizes 1Y, 2Y, 3Y, 4Y, 5Y, 6Y, 7Y, 8Y before transitioning into adult sizing.
Youth sizes are sometimes also written as GS (Grade School) by brands like Nike and Adidas — these mean the same thing as Y sizes.
Three key things to understand about Y sizing:
1 — Y is a US sizing system, not an Indian one
Indian and UK children's shoe sizing does not use the Y label. If you are shopping an Indian brand, you will not see Y sizes — you will see numbers following the Indian/UK scale (size 1, 2, 3 in youth). Y sizes appear when shopping US brands directly, on global e-commerce platforms, or on Indian sites that stock international brands.
2 — Y sizes are not the same numbers as Indian/UK youth sizes
A 5Y in US sizing is not the same as a UK/Indian size 5. They are different systems. A US 5Y corresponds to approximately Indian/UK size 4 — one full size below. This is one of the most common errors parents make when buying international brand shoes.
3 — Y sizes overlap with adult sizes at the top
At approximately 7Y and above, youth sizes begin to correspond to smaller adult sizes. A US 7Y is roughly equivalent to a US women's size 8.5 or a US men's size 7 — which is why youth shoes in larger Y sizes are often worn by adults with smaller feet.
What Does B Mean in Shoe Size?
B stands for Boys width — a standard width designation in US shoe sizing.
In US shoe sizing, width is measured and labelled separately from length. The width categories for children's and youth shoes are:
| Width Label | Meaning | Relative width |
|---|---|---|
| N or A | Narrow | Narrower than standard |
| M or B | Medium / Boys | Standard width |
| W or D | Wide | Wider than standard |
| XW or 2E | Extra Wide | Significantly wider than standard |
For boys' shoes, B = standard width — the default fit that most children's shoes are made in. When a shoe is labelled 7B, the B does not indicate a narrower or wider fit relative to what most children wear — it is the regular width.
Why does B appear on the label at all?
Because some brands label their shoes with width explicitly even when the width is standard, to distinguish them from wide-fit (W or D) versions of the same shoe. If you see 7B on a shoe listing, it means size 7, standard Boys width — the regular fit.
India-specific note: Indian shoe brands do not label width on children's shoes — they manufacture in a single standard width by default. The B label only appears when shopping US brands or platforms. If you are buying an Indian brand, width labelling is absent and the shoe is always standard width.
What Does M Mean in Shoe Size?
M stands for Medium width — the standard width in US shoe sizing.
M width is identical in practical terms to B width for children's shoes. Both B and M indicate a standard, medium-width shoe. The difference is convention:
- B is used for boys' shoes (Boys standard width)
- M is used for girls' shoes or unisex shoes (Medium standard width)
When you see 8M on a shoe, it means size 8, standard medium width — the regular fit. It is not a narrower or wider option. It is the default.
| Label | Used for | Meaning |
|---|---|---|
| 8B | Boys' shoe | Size 8, standard width |
| 8M | Girls' or unisex shoe | Size 8, standard width |
| 8W | Any | Size 8, wide width |
| 8N | Any | Size 8, narrow width |
Practical takeaway: For most parents buying shoes for their children, B and M mean the same thing — standard width, regular fit. Unless your child has been specifically recommended a wide or narrow fitting by a podiatrist or doctor, you will always be buying B or M width, whichever label the brand uses.
What Does 5Y Mean in Shoe Size?
5Y = US Youth size 5. Foot length approximately 22–23 cm. Indian/UK equivalent: size 4.
5Y is a common size for children aged approximately 10–11 years. It is one of the larger youth sizes and approaches the lower end of adult sizing in some brands.
| 5Y | |
|---|---|
| Sizing system | US Youth |
| Foot length | 22.0–23.0 cm |
| Indian / UK equivalent | Size 4 |
| EU equivalent | Size 37 |
| Approximate age | 10–11 years |
| US Women's equivalent | Size 6.5 |
| US Men's equivalent | Size 5 |
Who wears 5Y?
Children aged 10–11 years with a foot length of 22–23 cm. At JusCubs, this age range falls within the Young Boys (4Y–12Y) and Young Girls (4Y–12Y) clothing collections.
What Does 6Y Mean in Shoe Size?
6Y = US Youth size 6. Foot length approximately 23–24 cm. Indian/UK equivalent: size 5.
6Y is typically worn by children aged approximately 11–12 years. At this size, some children — particularly girls — begin to fit smaller adult women's sizes, which can open up a wider range of shoe styles.
| 6Y | |
|---|---|
| Sizing system | US Youth |
| Foot length | 23.0–24.0 cm |
| Indian / UK equivalent | Size 5 |
| EU equivalent | Size 38 |
| Approximate age | 11–12 years |
| US Women's equivalent | Size 7.5 |
| US Men's equivalent | Size 6 |
India-specific note: Indian girls aged 11–12 who wear 6Y often find they can shop in women's shoe ranges — particularly for casual and school styles — using Indian size 5 or 6. This can significantly expand the available styles and price points.
What Does 7Y Mean in Shoe Size — and What Size Is a 7Y?
7Y = US Youth size 7. Foot length approximately 24–25 cm. Indian/UK equivalent: size 6.
7Y is a large youth size, typically worn by children aged approximately 12–13 years. It overlaps meaningfully with adult sizing — a 7Y is equivalent to a US Women's size 8.5 and a US Men's size 7, which means a child in 7Y can often wear adult shoes in those sizes.
| 7Y | |
|---|---|
| Sizing system | US Youth |
| Foot length | 24.0–25.0 cm |
| Indian / UK equivalent | Size 6 |
| EU equivalent | Size 39–40 |
| Approximate age | 12–13 years |
| US Women's equivalent | Size 8.5 |
| US Men's equivalent | Size 7 |
What size is a 7Y in Indian sizing?
A 7Y corresponds to Indian/UK size 6. If you are buying a 7Y international brand shoe for your child and want to compare it to Indian sizing, size 6 is the equivalent — though always verify by foot length measurement, since construction varies between brands.
Youth 7 shoe size: The term "youth 7 shoe size" refers to the same size as 7Y — US Youth size 7, foot length 24–25 cm, Indian/UK size 6.
For clothing at this age: Young Boys (4Y–12Y) and Young Girls (4Y–12Y).
What Does 8Y Mean in Shoe Size?
8Y = US Youth size 8. Foot length approximately 25–26 cm. Indian/UK equivalent: size 7.
8Y is at the top of the youth sizing range for most brands. Children wearing 8Y are typically aged 13–14 years and are often crossing into adult shoe sizing. Many brands do not carry 8Y separately — they transition to adult sizes at 7Y or 8Y.
| 8Y | |
|---|---|
| Sizing system | US Youth |
| Foot length | 25.0–26.0 cm |
| Indian / UK equivalent | Size 7 |
| EU equivalent | Size 40–41 |
| Approximate age | 13–14 years |
| US Women's equivalent | Size 9.5 |
| US Men's equivalent | Size 8 |
At 8Y, always check whether adult sizing offers better options. Indian adult women's shoes begin at size 3–4 (Indian) and adult men's at size 6–7 (Indian). A child in 8Y / Indian size 7 may find a wider range of styles, colours, and durability levels in adult ranges.
What Does 7B Mean in Shoe Size?
7B = US Boys standard width, size 7. Foot length approximately 24–25 cm. Indian/UK equivalent: size 6.
The B in 7B means standard Boys width — the regular, default width. It does not mean the shoe is narrow. 7B is simply a size 7 boys' shoe in standard width, using the US Youth sizing system.
| 7B | |
|---|---|
| Sizing system | US Youth (Boys) |
| Width | Standard / Medium (B) |
| Foot length | 24.0–25.0 cm |
| Indian / UK equivalent | Size 6 |
| EU equivalent | Size 39–40 |
| Approximate age | 12–13 years |
Is 7B the same as 7Y?
In terms of length — yes. 7B and 7Y refer to the same shoe length (foot length 24–25 cm). The difference is that 7B specifies the width (standard Boys width), while 7Y specifies only the size in the Youth system without referencing width. In practice, most youth shoes sold as 7Y are made in standard B width by default.
What Does 8B Mean in Shoe Size?
8B = US Boys standard width, size 8. Foot length approximately 25–26 cm. Indian/UK equivalent: size 7.
8B is a size 8 boys' shoe in standard width — the regular fit, not a narrow fitting. It is the same length as 8Y but with the width specified as standard Boys (B).
| 8B | |
|---|---|
| Sizing system | US Youth (Boys) |
| Width | Standard / Medium (B) |
| Foot length | 25.0–26.0 cm |
| Indian / UK equivalent | Size 7 |
| EU equivalent | Size 40–41 |
| Approximate age | 13–14 years |
Practical note for Indian parents: If you are comparing an 8B shoe from a US brand to an Indian brand's size chart, look for Indian size 7 and verify against foot length. Do not use the number 8 directly across systems — an Indian size 8 is an adult size, significantly larger than a US Youth 8B.
What Does 8M Mean in Shoe Size?
8M = US Medium width, size 8. Foot length approximately 25–26 cm. Indian/UK equivalent: size 7.
8M is a size 8 shoe in standard medium width — the default, regular fit. M width is used for girls' or unisex shoes where B width is used for boys'. Both 8M and 8B represent the same standard width and the same foot length — only the label convention differs.
| 8M | |
|---|---|
| Sizing system | US Youth (Girls / Unisex) |
| Width | Medium (M) — standard width |
| Foot length | 25.0–26.0 cm |
| Indian / UK equivalent | Size 7 |
| EU equivalent | Size 40–41 |
| Approximate age | 13–14 years |
8M vs 8B vs 8Y — what is the difference?
| Size | System | Width specified | Foot length | Indian/UK |
|---|---|---|---|---|
| 8Y | US Youth | No — default standard | 25–26 cm | 7 |
| 8B | US Youth Boys | Yes — Boys standard | 25–26 cm | 7 |
| 8M | US Youth Girls / Unisex | Yes — Medium standard | 25–26 cm | 7 |
All three are the same foot length and the same effective fit for a child with a standard-width foot. The only practical difference is which gender the shoe is marketed to.
Complete Y Size to Indian/UK Conversion Chart
US Youth (Y) to Indian/UK, EU & Foot Length Reference
| US Youth (Y) | Indian / UK | EU | Foot Length (cm) | Approx. Age |
|---|---|---|---|---|
| 1Y | 13 (Children's) | 32 | 19.0–19.5 cm | 7–8 years |
| 2Y | 1 (Youth) | 33–34 | 19.5–20.5 cm | 8–9 years |
| 3Y | 2 | 34–35 | 20.5–21.5 cm | 9–10 years |
| 3.5Y | 2.5 | 35 | 21.5–22.0 cm | 10 years |
| 4Y | 3 | 36 | 22.0–22.5 cm | 10–11 years |
| 4.5Y | 3.5 | 36–37 | 22.5–23.0 cm | 11 years |
| 5Y | 4 | 37 | 22.0–23.0 cm | 10–11 years |
| 5.5Y | 4.5 | 37–38 | 23.0–23.5 cm | 11 years |
| 6Y | 5 | 38 | 23.0–24.0 cm | 11–12 years |
| 6.5Y | 5.5 | 38–39 | 23.5–24.0 cm | 12 years |
| 7Y | 6 | 39–40 | 24.0–25.0 cm | 12–13 years |
| 7.5Y | 6.5 | 40 | 24.5–25.5 cm | 13 years |
| 8Y | 7 | 40–41 | 25.0–26.0 cm | 13–14 years |
Critical rule when converting: Never convert by matching numbers directly across systems. A US Youth 5Y is not the same as an Indian size 5. Always convert via foot length in centimetres — it is the only measurement that is universal across all sizing systems.
Youth Shoe Size to Age Chart
| Age | Foot Length (cm) | US Youth Size | Indian / UK Size | EU Size |
|---|---|---|---|---|
| 7 years | 17.5–18.5 cm | — (still Kids) | 12.5–13 | 31.5–32 |
| 8 years | 18.5–19.5 cm | 1Y | 1 Youth | 33–34 |
| 9 years | 19.5–20.5 cm | 2Y | 2 Youth | 34–35 |
| 10 years | 20.5–21.5 cm | 3Y | 3 Youth | 35–36 |
| 11 years | 21.5–22.5 cm | 4Y | 4 Youth | 36–37 |
| 12 years | 22.5–24.0 cm | 5Y–6Y | 4–5 Youth | 37–38 |
| 13 years | 24.0–25.0 cm | 6Y–7Y | 5–6 Youth | 38–40 |
| 14 years | 25.0–26.0 cm | 7Y–8Y | 6–7 Youth | 40–41 |
For the complete shoe size reference from newborn through 12 years: Shoe Size & Age Chart for Kids: From Newborn to 12 Years
For the preschool shoe size guide covering ages 3–5: Preschool Shoe Size Chart: What Shoe Size Does a 3–5 Year Old Wear?
How to Find the Right Youth Shoe Size for Your Child
Step 1 — Measure foot length at home
Place a sheet of A4 paper on a hard floor. Have your child stand on it with full weight on their foot. Trace around the entire foot, keeping the pencil vertical. Measure from the furthest back point of the heel to the tip of the longest toe in centimetres. Use the larger of the two feet.
Step 2 — Add 1 cm for growing room
Add 1 cm to the measured foot length. This is the minimum space needed for comfortable wear and healthy foot development. For a child in a growth phase or if buying ahead for a season, add 1.2–1.5 cm.
Step 3 — Convert using foot length, not size numbers
Find your total (measured length + growing room) in the foot length column of the chart in Section 11. Read across to the US Youth Y size and the Indian/UK equivalent. Do not match numbers directly between systems.
Step 4 — Identify width need
If your child has a standard-width foot — which the large majority of children do — you need B or M width (both standard). Only buy W (wide) or N (narrow) if a doctor or podiatrist has recommended a specific width fitting.
Step 5 — Confirm brand-specific sizing
Youth shoe sizing is not perfectly standardised across brands. Nike, Adidas, Puma, and Bata all use slightly different lasts (the internal foot shape they build shoes around). For a new brand, size up by half a size from your calculated result and check the return policy before buying online.
For school and daily-wear clothing at youth shoe sizes, browse:
- Young Boys (4Y–12Y) — T-Shirts & Polo, Shirts, Clothing Sets, Pants, Jeans & Trousers, Shorts & Threefourth, Sweatshirts, Jackets & Hoodies, Sleepwear & Loungewear, Party Wear
- Young Girls (4Y–12Y) — T-Shirts & Polo, Frocks & Dresses, Clothing Sets, Jeans & Jeggings, Sweatshirts, Jackets & Hoodies, Party Wear, Sleepwear & Loungewear
For the clothing size chart at this age: Complete Kids T-Shirt Size Chart India: Youth XS to XL
Headline: Shop youth clothing to match every shoe size at JusCubs
Body: Soft cotton T-shirts, clothing sets, hoodies, party wear and more for Indian children aged 4 to 12 years. Starting from ₹349.
Button 1: Young Boys (4Y–12Y) → https://www.juscubs.com/collections/young-boys-4y-12y
Button 2: Young Girls (4Y–12Y) → https://www.juscubs.com/collections/young-girls-4y-12y
Frequently Asked Questions
What does Y mean in shoe size?
Y stands for Youth — a US shoe sizing system for older children aged approximately 7 to 14 years. Youth sizing begins where US Kids sizing ends, at approximately size 13 / foot length 18.5 cm, and continues as 1Y, 2Y, 3Y up to 8Y or beyond. Y sizes are a US convention and do not appear on Indian or UK shoe labels.
What does 5Y mean in shoe size?
5Y means US Youth size 5. It fits a foot length of approximately 22–23 cm and corresponds to Indian/UK size 4 and EU size 37. It is typically worn by children aged 10–11 years.
What does 6Y mean in shoe size?
6Y means US Youth size 6. It fits a foot length of approximately 23–24 cm and corresponds to Indian/UK size 5 and EU size 38. It is typically worn by children aged 11–12 years.
What is 7Y in shoe size?
7Y is US Youth size 7. It fits a foot length of approximately 24–25 cm and corresponds to Indian/UK size 6 and EU size 39–40. It is typically worn by children aged 12–13 years. At this size, youth shoes also begin to correspond to adult sizes — approximately US Women's 8.5 or US Men's 7.
What size is a 7Y in Indian sizing?
A 7Y corresponds to Indian/UK size 6. Never convert Y sizes to Indian sizes by matching numbers directly — a US 7Y and an Indian size 7 are completely different foot lengths. Always convert via foot length: 7Y = 24–25 cm foot length = Indian/UK size 6.
What does 7B mean in shoe size?
7B means US Youth size 7 in standard Boys width (B = Medium/standard width). The B indicates a regular-width fitting, not a narrow one. 7B and 7Y refer to the same foot length (24–25 cm) — the B simply specifies the width explicitly as standard.
What does 8B mean in shoe size?
8B means US Youth size 8 in standard Boys width. It fits a foot length of approximately 25–26 cm and corresponds to Indian/UK size 7 and EU size 40–41. It is the regular standard-width fitting for size 8 boys' shoes.
What does 8M mean in shoe size?
8M means US Youth size 8 in Medium width — the standard-width designation used for girls' or unisex shoes (compared to B which is used for boys'). 8M and 8B are the same physical width — both standard. 8M fits a foot length of approximately 25–26 cm and corresponds to Indian/UK size 7.
What is youth 7 shoe size in Indian sizing?
Youth 7 shoe size (7Y or 7B) corresponds to Indian/UK size 6 and EU size 39–40, with a foot length of approximately 24–25 cm. It is typically worn by children aged 12–13 years.
Is B width narrow in shoe sizing?
No. B width is standard width in US boys' shoe sizing — the regular, default fit. It is not narrow. Narrow width in US sizing is labelled N or A. If you see a size listed as 7B or 8B, it means standard width, not narrow.
Does JusCubs carry youth clothing for children in Y shoe sizes?
Yes. The Young Boys (4Y–12Y) and Young Girls (4Y–12Y) collections cover children aged 4 to 12 years — the full age range corresponding to US Youth shoe sizes 1Y through 8Y. Every product includes measurement details. Find your nearest store at JusCubs Store Locator.
RELATED ARTICLES
- Shoe Size & Age Chart for Kids: From Newborn to 12 Years → https://www.juscubs.com/blogs/blog-posts/shoe-size-age-chart-kids
- Preschool Shoe Size Chart: What Shoe Size Does a 3–5 Year Old Wear? → https://www.juscubs.com/blogs/blog-posts/preschool-shoe-size-chart
- 5T Size Guide: Measurements, Age Range & Is It Small or Medium? → https://www.juscubs.com/blogs/blog-posts/5t-size-guide-measurements
- Is Youth XS the Same as 4T? Toddler to Youth Size Transition Explained → https://www.juscubs.com/blogs/blog-posts/youth-xs-vs-4t-size-guide
- Complete Kids T-Shirt Size Chart India: Youth XS to XL → https://www.juscubs.com/blogs/blog-posts/complete-kids-t-shirt-size-chart-india
- What Does 2T Mean? Complete 2T Size Guide for Toddlers → https://www.juscubs.com/blogs/blog-posts/what-does-2t-mean-size-guide
- What to Look Out for When Shopping for Your Kid's Clothing → https://www.juscubs.com/blogs/blog-posts/what-to-look-out-for-when-shopping-for-your-kid-s-clothing