I got medium because that what I wear, they fit well everywhere except the waist, they're a little tight but not too bad. I love the texture of them, they have a silky type texture. Super breathable and thin but not overly thin. They'll be perfect for work.

For me these felt slightly snug. If you're right between sizes, go larger. These have a nice elastic band and draw strings will make the fit perfect. The material is a bit slicker than I normally buy, you might want to wash them with more delicate item. Don't use bleach. I use these to lounge around the house.