Calida Response: Yes, this is indeed a great long panty, and the fabric is heavenly, made of pima compact cotton. If you are a size 10 in slacks/pants your size would be a small. Calida’s small's will fit a person who is an 8/10. The medium you ordered fits a 12/14. Please check the size chart before ordering and feel free to ask for help with your sizing. Calida runs a little fuller allowing for some shrinkage, approximately 5% in width and 5% in length. Sandy from Bella Vista, AR