When purchasing shapewear, use your dress size as your guide. If your shapewear is too small, the waist and leg bands will cut into your skin.
Getting the Perfect Shapewear Fit
How to Put on Shapewear
Step into your shapewear - even with a camisole. The secret is to gather up the garment like you do with pantyhose. Step into it and secure the crotch against your body, then pull down the legs. Next pull it up to your waist, under your bust or over your shoulders depending on the style of shapewear.