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undies that your kid will actually want to wear
website logo for WunderUndies, a children's underwear company.

Size Guide

When returns aren’t an option it becomes even more important to get that size right the first time. So please do check out this measurement and size guide for our amazingly comfortable children’s underwear to be sure you’re getting the right one for your kiddo.

Please note that our boxer briefs run small in sizes 2T-8. If your child measures well into a size, size up 1. If they measure between sizes, size up 2 sizes. Purchasing a size 10 should suffice for anyone who measures into a size 8.

SizeHips (in)Waist (in)

For Undies, measure hips.
If between sizes, size up.

a cartoon girl in her underwear showing how to measure properly for your clothes.
two cartoon children wearing purple capes and underwear and reaching for a star