Women's to Kids' Shoe Size Conversion Guide

For most mainstream brands, a women's U.S. shoe size usually converts to a kids' or youth size by subtracting about 1.5 sizes. Current Nike and New Balance charts both map women's 7 to youth 5.5. Use that as a starting point, then confirm with foot length and the specific model's fit notes.

Table Of Contents

Short answer

If you wear a women's U.S. size 5 through 8.5, you are usually shopping in the kids' big-youth range. Above that, many brands run out of youth sizing. The conversion is useful, but it is not the last step.

Quick conversion chart

Women's US	Typical kids/youth US	Seen on current brand charts
5	3.5Y	Nike, New Balance
5.5	4Y	Nike, New Balance
6	4.5Y	Nike, New Balance
6.5	5Y	Nike, New Balance
7	5.5Y	Nike, New Balance
7.5	6Y	Nike, New Balance
8	6.5Y	Nike, New Balance
8.5	7Y	Nike, New Balance

That chart is the fast rule. Your best fit still comes from the brand's own size guide and the exact shoe page.

Why the 1.5-size rule usually works

Nike's kids footwear chart explicitly lines up youth sizes with women's sizes, and New Balance's big-kid guide does the same. adidas women's and adidas youth charts also land in the same general heel-to-toe range, which is why the rule works as a starting estimate across major brands.

Measure first, then convert

When you are between sizes, foot length beats the shortcut. Nike's women's size guide and kids guide both tell shoppers to measure heel to toe and use the longer foot if the two differ. That keeps you from forcing a conversion that looks right on paper but misses in the toe box.

Brand notes that can change the fit

The conversion tells you where to start, not what to buy blindly. For example, the Nike Air Force 1 big-kids page says the shoe fits large and recommends a half size down. Converse's women's chart says Chuck sneakers run large, and the kids guide says fit can vary by style. That is exactly why a clean conversion still needs a model check.

When the conversion stops working

The quick rule is most useful from women's 5 to 8.5 because youth lines usually top out around 7Y. If you wear larger than a women's 8.5, you will often age out of kids sizing. It also stops being a simple money-saving trick when the kids version uses a different last, different cushioning package, or different fit guidance than the adult version. Compare the product page, not just the size label.

Shopping checklist

Convert your women's size by subtracting about 1.5 to get a first youth-size guess.
Measure heel-to-toe length and compare it to the brand chart before buying.
Read the exact model page for fit notes like runs large or fit may vary.
Check width options if you need them. New Balance publishes width columns for some big-kid shoes, but not every brand or style does.
If the shoe only works on paper and not by length, trust the length chart.

Bottom line

The best current rule is simple: women's U.S. size minus 1.5 usually gets you into kids' youth sizing. Nike and New Balance explicitly support that mapping, while adidas and Converse reinforce the bigger lesson that length and model-specific fit notes matter more than the shortcut. Use the conversion to narrow the search, then let the brand chart make the final call.