Side-by-Side Comparison
Shoe Sizes
Adult Shoes vs. Kids & Baby Shoes
Comparing 2 standards across 13 specifications. 13 key differences identified.
Comparing:
Adult Shoes
Kids & Baby Shoes
Universal adult shoe size conversion matrix comparing foot length in centimeters, millimeters (Mondopoint), and inches against standard sizing systems: US Men's, US Women's, UK (Barleycorn), European (Paris Points), and Japanese (JP cm).
Kids and baby footwear sizing stages standardize four developmental age brackets: Baby/Infant (0–12 months, US 0.5–4), Toddler (1–4 years, US 4.5–10), Little Kid/Preschool (4–8 years, US 10.5–13.5), and Big Kid/Youth (8–12 years, US 1–7), transitioning seamlessly into adult footwear sizes.
Specification Comparison Table
13 Parameters| Parameter / Spec | ||
|---|---|---|
|
Governing Standards
|
ISO 19407 / ISO 9407 / SATRA TM / ASTM F2413 | SATRA Footwear Standards / APMA Children's Sizing Guidelines |
|
Mondopoint Standard (ISO 9407)
|
Exact foot length in millimeters (e.g., 270 mm = 27.0 cm) | — |
|
European Standard (Paris Point)
|
1 Paris Point = 2/3 cm (6.67 mm) last length | — |
|
US & UK Standard (Barleycorn)
|
1 Full Size = 1/3 inch (8.47 mm) | 1 Half Size = 1/6 inch (4.23 mm) | — |
|
US Men vs US Women Offset
|
US Women's Size = US Men's Size + 1.5 (e.g., Men's 8.0 = Women's 9.5) | — |
|
US Men vs UK Offset
|
US Men's Size = UK Size + 1.0 (e.g., UK 9.0 = US Men's 10.0) | — |
|
Japanese System (JP)
|
Direct barefoot length in centimeters (e.g., 26.5 cm = JP 26.5) | — |
|
Baby / Infant Stage
|
— | Age 0–12 Months | US 0.5 to 4 | EU 16 to 19 | Foot Length 8.3–11.4 cm |
|
Toddler / Walker Stage
|
— | Age 1–4 Years | US 4.5 to 10 | EU 20 to 27 | Foot Length 11.7–16.5 cm |
|
Little Kid / Preschool Stage
|
— | Age 4–8 Years | US 10.5 to 13.5 | EU 28 to 31 | Foot Length 16.8–19.1 cm |
|
Big Kid / Youth Stage
|
— | Age 8–12 Years | US 1.0 to 7.0 | EU 32 to 39 | Foot Length 19.7–24.8 cm |
|
Adult Transition Boundary
|
— | Youth Size 7 (US Big Kid 7) = US Men's 7.0 = US Women's 8.5 (25.0 cm foot) |
|
Growth Allowance Rule
|
— | Add 1/2 inch (12 mm) of thumb clearance space for growing feet |