S (4-6) 36”-38.5”

M (8-10) 39”-41.5”

L (10-12) 42”-44.5”

XL (14) 45”-47.5”

Disclaimer: Sizes may run on the smaller side. Especially the midnight set. Items stretch, so if you like the tight fit stick with your size. If you want a more loose/relaxed fit, go up a size.