Kids’ Shoe Widths Reference Matrix

Children’s Shoe Widths Sizing & Measurement Matrix

Comprehensive reference matrix mapping children’s shoe width fittings, Brannock infant/child grades, M/W/XW sizing indexes, transverse ball width dimensions, and recommended growth allowance margins.

Children’s Shoe Widths Standard Specifications

Detailed breakdown of standardized shoe width fittings, Brannock infant/child grades, M/W/XW sizing indexes, transverse ball width dimensions, and growth allowance margins for children’s footwear.

United States	Europe	United Kingdom	Italy	France	Australia	Japan	South Korea	China	Brazil	Mexico	International	US Type	Width Grade	Foot Length ( $\text{cm}$ )	Foot Length ( $\text{in}$ )	Ball Width ( $\text{cm}$ )	Ball Width ( $\text{in}$ )	Growth Margin ( $\text{cm}$ )	Est. Age	Mondopoint ( $\text{mm}$ )	Fit Type
0-W	16	0	16	16	0	85	85	85	14	8	NB	Infant	Narrow (B)	8.5	3.3	3.8	1.5	0.5	0-3m	85	Infant Narrow (US 0 / Width B)
0-M	16	0	16	16	0	85	85	85	14	8	NB	Infant	Medium / Standard (D)	8.5	3.3	4.1	1.6	0.5	0-3m	85	Infant Medium (US 0 / Width D)
2-W	18	2	18	18	2	100	100	100	16	10	NB	Infant	Wide (2E)	10	3.9	4.8	1.9	0.6	6-9m	100	Infant Wide (US 2 / Width 2E)
4-XW	20	3.5	20	20	3.5	115	115	115	18	11.5	INF	Infant	Extra-Wide (4E)	11.5	4.5	5.6	2.2	0.6	12-18m	115	Infant Extra-Wide (US 4 / Width 4E)
5-N	21	4.5	21	21	4.5	125	125	125	19	12.5	TOD	Toddler	Narrow (B)	12.5	4.9	5.3	2.1	0.8	18-24m	125	Toddler Narrow (US 5 / Width B)
6-M	22	5.5	22	22	5.5	130	130	130	20	13	TOD	Toddler	Medium / Standard (D)	13	5.1	5.8	2.3	0.8	2-3y	130	Toddler Medium (US 6 / Width D)
7-W	23.5	6.5	23.5	23.5	6.5	140	140	140	21	14	TOD	Toddler	Wide (2E)	14	5.5	6.3	2.5	0.8	3-4y	140	Toddler Wide (US 7 / Width 2E)
9-XW	26	8.5	26	26	8.5	155	155	155	23	15.5	TOD	Toddler	Extra-Wide (4E)	15.5	6.1	7.1	2.8	0.9	4-5y	155	Toddler Extra-Wide (US 9 / Width 4E)
10-M	27	9.5	27	27	9.5	165	165	165	24	16.5	PRE	Little Kid	Medium / Standard (D)	16.5	6.5	6.7	2.65	1	5-6y	165	Little Kid Medium (US 10 / Width D)
11-W	28.5	10.5	28.5	28.5	10.5	175	175	175	25	17.5	PRE	Little Kid	Wide (2E)	17.5	6.9	7.4	2.9	1	6-7y	175	Little Kid Wide (US 11 / Width 2E)
12-XW	30	11.5	30	30	11.5	185	185	185	27	18.5	PRE	Little Kid	Extra-Wide (4E)	18.5	7.3	8	3.15	1	7-8y	185	Little Kid Extra-Wide (US 12 / Width 4E)
13-M	31	12.5	31	31	12.5	190	190	190	28	19	PRE	Little Kid	Medium / Standard (D)	19	7.5	7.3	2.85	1	8-9y	190	Little Kid Medium (US 13 / Width D)
1-N	32	13.5	32	32	13.5	200	200	200	29	20	YTH	Big Kid	Narrow (B)	20	7.9	7.5	2.95	1.2	9-10y	200	Big Kid Narrow (US 1 / Width B)
3-M	34	2.5	34	34	2.5	215	215	215	31	21.5	YTH	Big Kid	Medium / Standard (D)	21.5	8.5	8.2	3.2	1.2	10-11y	215	Big Kid Medium (US 3 / Width D)
5-W	37	4.5	37	37	4.5	230	230	230	33	23	YTH	Big Kid	Wide (2E)	23	9.1	9.1	3.6	1.2	11-12y+	230	Big Kid Wide (US 5 / Width 2E)
7-XW	39	6.5	39	39	6.5	245	245	245	35	24.5	YTH	Big Kid	Extra-Wide (4E)	24.5	9.6	10	3.95	1.2	13y+	245	Big Kid Extra-Wide (US 7 / Width 4E)

* Sizing can vary significantly between international brands and regional manufacturers. Use this matrix as a baseline reference for standard proportional conversions.

Interpreting Children’s Shoe Width & Fitting Dimensions

Standardizing children’s footwear width fittings—covering narrow, medium/standard, wide, and extra-wide categories—requires correlating pediatric foot length with transverse ball width dimensions, heel-to-ball proportions, and growth allowance margins. Because growing feet expand both longitudinally and laterally, utilizing a dedicated width grading matrix ensures proper lateral support without pinching or restriction.

When utilizing this matrix for width fitting or size conversion, reference the ball width in centimeters alongside Brannock infant and child grades (W, M, XW / B, D, 2E) and Mondopoint specifications to accommodate international manufacturing variations across global markets.

Why You Must Use Both Size Charts Together

Pediatric footwear fit is inherently two-dimensional. While this Kids’ Shoe Widths size chart establishes transverse ball width fittings and Brannock grades, evaluating width metrics in isolation can lead to incorrect length selection and toe cramping.

To achieve a truly tailored and healthy fit for growing feet, you should use this size chart in tandem with the specialized Kids’ Shoes tool by following a structured evaluation process:

Step 1: Identify your child’s required width grade, Brannock classification, and transverse ball width dimensions using this Kids’ Shoe Widths reference matrix.
Step 2: Transition to the Kids’ Shoes converter to establish the foundational longitudinal heel-to-toe length, estimated age bracket, and Mondopoint scale.
Step 3: Cross-reference both specifications to ensure your child’s footwear selection perfectly accommodates both transverse ball width and longitudinal length.

Indexed Sizing Tiers & Dimensions

0-WWidth

Width Fitting: Narrow (B), Foot Length: 8.5 cm, Ball Width: 3.8 cm, Age: 0-3m mapping for US size 0-W

Symbol: 0-WBase Value: 8.5

0-MWidth

Width Fitting: Medium / Standard (D), Foot Length: 8.5 cm, Ball Width: 4.1 cm, Age: 0-3m mapping for US size 0-M

Symbol: 0-MBase Value: 8.5

2-WWidth

Width Fitting: Wide (2E), Foot Length: 10 cm, Ball Width: 4.8 cm, Age: 6-9m mapping for US size 2-W

Symbol: 2-WBase Value: 10

4-XWWidth

Width Fitting: Extra-Wide (4E), Foot Length: 11.5 cm, Ball Width: 5.6 cm, Age: 12-18m mapping for US size 4-XW

Symbol: 4-XWBase Value: 11.5

5-NWidth

Width Fitting: Narrow (B), Foot Length: 12.5 cm, Ball Width: 5.3 cm, Age: 18-24m mapping for US size 5-N

Symbol: 5-NBase Value: 12.5

6-MWidth

Width Fitting: Medium / Standard (D), Foot Length: 13 cm, Ball Width: 5.8 cm, Age: 2-3y mapping for US size 6-M

Symbol: 6-MBase Value: 13

7-WWidth

Width Fitting: Wide (2E), Foot Length: 14 cm, Ball Width: 6.3 cm, Age: 3-4y mapping for US size 7-W

Symbol: 7-WBase Value: 14

9-XWWidth

Width Fitting: Extra-Wide (4E), Foot Length: 15.5 cm, Ball Width: 7.1 cm, Age: 4-5y mapping for US size 9-XW

Symbol: 9-XWBase Value: 15.5

10-MWidth

Width Fitting: Medium / Standard (D), Foot Length: 16.5 cm, Ball Width: 6.7 cm, Age: 5-6y mapping for US size 10-M

Symbol: 10-MBase Value: 16.5

11-WWidth

Width Fitting: Wide (2E), Foot Length: 17.5 cm, Ball Width: 7.4 cm, Age: 6-7y mapping for US size 11-W

Symbol: 11-WBase Value: 17.5

12-XWWidth

Width Fitting: Extra-Wide (4E), Foot Length: 18.5 cm, Ball Width: 8 cm, Age: 7-8y mapping for US size 12-XW

Symbol: 12-XWBase Value: 18.5

13-MWidth

Width Fitting: Medium / Standard (D), Foot Length: 19 cm, Ball Width: 7.3 cm, Age: 8-9y mapping for US size 13-M

Symbol: 13-MBase Value: 19

1-NWidth

Width Fitting: Narrow (B), Foot Length: 20 cm, Ball Width: 7.5 cm, Age: 9-10y mapping for US size 1-N

Symbol: 1-NBase Value: 20

3-MWidth

Width Fitting: Medium / Standard (D), Foot Length: 21.5 cm, Ball Width: 8.2 cm, Age: 10-11y mapping for US size 3-M

Symbol: 3-MBase Value: 21.5

5-WWidth

Width Fitting: Wide (2E), Foot Length: 23 cm, Ball Width: 9.1 cm, Age: 11-12y+ mapping for US size 5-W

Symbol: 5-WBase Value: 23

7-XWWidth

Width Fitting: Extra-Wide (4E), Foot Length: 24.5 cm, Ball Width: 10 cm, Age: 13y+ mapping for US size 7-XW

Symbol: 7-XWBase Value: 24.5