I usually purchase s or m size. I got this jumpsuit on S and fits perfect so I say runs very slightly bigger. If you have flatter belly this looks perfect. I could imagine it not fitting right if you have bigger stomach as some reviews mentioned as it has elastic that might look funny. But I love this on me! Absolutely stunning. Love the fabric and color! Bit long for me but easy to fix esp wearing high heels.

This jumper is very cute and even cuter on!!!!