Not sure what the sizing is (or if there are even different sizes). But the ones my ife bought she loved...and so did my 13 year old daughter. So much so that we had to buy a second pair.

As stated, I'm not sure if there are different sizes, but what I can say is, my wife @ 5' 100 lbs these fit well, tho baggy on my daughter (13 yr old is 75+ lbs, sub 5')