I am wearing a size XS in the bodysuits/top, and they fit true to size IMO. You would definitely be ok sizing up as well, since they are super fitted.

These bodysuits/tops are soft, double layered and are the best skims look for less ones out there. All styles are $26 or less!

Click the below pics to shop

And here is skort I was wearing. Wearing an XS, true fit. I also own in black.