I'm 5'2", pre-pregnancy weight is around 130lbs, I used to wear medium/sz 8. I have a defined hourglass figure, busty, narrow waist with most of my weight settling around my hips and thighs. Proportionally I have a long torso and short legs with thicker thighs. I'm in my 2nd trimester at 155lbs. These are one-size only. The rise for the belly just isn't high enough. The adjustable waist elastic would be useful if there were 4 more inches of material to sit above the bump. Right now the waistband wants to sit about halfway up my belly. Additionally, these were really tight and uncomfortable on my thighs, as they would slide down and the crotch seams would dig in halfway up my thighs.. this might be a length/height issue, but I'm 5'2".. If you tend to be taller and much thinner than me these might work ok for you. Unfortunately these won't work for my 3rd trimester as we head into winter :( I'll probably keep these for future non-pregnant winters as they are nice and thick, and I haven't noticed any durability issues the handful of times I've worn these. I liked the black sheer illusion effect. I don't think these are the best maternity tights though.