Wearing size small for reference on the size 0 in regular jeans size 2 in juniors but they’re just not very tight on the waist. It’s such a cute romper, but it wasn’t super tight on the waist so I am going to get an extra small however if you need a belt, this belt goes with everything highly recommend and snatch sandals up now trust me LTKStyleTip LTKPetite LTKFindsUnder50