I am a very consistent size 10.  According to the size chart on the packaging, a medium fits size 10 or 12.  That is mission impossible.  I thought I was going to pass out and break the elastic around the waistband trying to get it over my hips...ouch ouch ouch!  When I finally got the garment on, I was SO disappointed to see that it offered very little tummy control.  It is not "Firm Control" whatsoever.  The only thing tight or firm about the garment is the waistband.  Seems the garment is made for women with very slim hips, moderate to large thighs, and little need for tummy control or waist whittling.  If that is you, go for it, but I will not buy a Dr. Rey garment again.  Give me my Squeem garments any day, at any price.