these jeans are nice and thick and rigid but dont fit too tight or too loose at all. they are fitted at the waist and relaxed in the thigh and leg. they're perfect mom jeans and very flattering on. my waist stretched a little throughout the day but nothing crazy. I'm about 5'7" and I weigh around 136-138 usually. I wear a 26 in pacsun denim and a 27 in most other places unless I'm familiar with their sizing. I wear a size 4 in AE jeans and I like mine snug because I'm always on the move. I'm usually a size 4 or 5 depending on sizing. hope my references help. I also have about 10-12 pairs of pac denim just from the past year alone and I always get 26 in the 100% cotton styles or mom jeans\vintage high rise styles. I love them all and they all fit me the same.I recommend sizing down an inch for leggings and READ THE DESCRIPTION DETAILS!! it helps if you know the materials and how much stretch you have to work with!