I bought these for 3 and 6 year olds. Both of my girls are above average so I always go bigger and I did that for them too. The legs fit both perfectly, but the waist was a bit large. I ended up rolling my waist up once for both kids (similar to how you sometimes roll up your pants). They also have belt loops, so that's an option too if you run into this problem. Both of my girls ended up loving their new "jeans" and wanting to wear them non-stop all week.
School Uniform Pants & Capris for Girls - Premium Skinny Stretchable Clothing
40 Review
WDIRARA Girls' Clothing: Multicolor Snakeskin Print, Casual Stretch Pants & Capris
49 Review
Water-Resistant Snow Pant for Girls - Amazon Essentials
35 Review
Premium Organic Cotton Girls' Clothing by Hope Henry Riding: Sustainable and Stylish Fashion
33 Review