One feature that makes yoga pants so relaxing and comfortable is the stretchable waist band.  When looking at measurements they have a negative ease, which means the measurements below will be smaller than your body's measurements.  This is so the pants will fit snuggly around your waist like a sexy second skin. 

How tight you choose to have them is up to you.  Our pants are true to size (no vanity sized) and size to women's specs (not juniors), see size range below:

Waist Band Pants Size
Small 26 to 28 inches 2 - 4
Medium 29 to 30 inches 6 - 8
Large 32 to 34 inches 10 - 12
X-Large 35 to 37 inches 14 - 16