Size Chart

XXS: waist 28-30" ; hip 30-32"

XS: waist 29-31"; hip 33-35"

S: waist 32-34"; hip 35.5-37.5"

M: waist 35-37"; hip 38-40" 

L: waist 38-40"; hip 41-43"

XL: waist 41-43"; hip 44-46"

XXL: waist 44-47"; hip 47-50"

3X: waist 48-51"; hip 51-54"

4X: waist 52-55"; hip 55-58"

"Waist" is your low waist measurement, about an inch below your navel. "Hip" is the fullest part of your hips (including your butt!)--measured about 8 or 9 inches below the waist. 

These are sewn in a firm and supportive fabric. If you're between sizes, I recommend sizing up.