I have several other pairs of OR pants/shorts all of which are a size small/4. I'm 5'7" and 133. On recommendation from other users I ordered a size up when I ordered the ferrosi pants. The pants were actually quite loose and I was glad I had a draw string. But, they'll be great for climbing as I do not like feeling restricted. For the shorts, I initially opted to go back to my normal OR size - 4 - and ordered the Ferrosi in a size 4. Too small. So I ordered the size 6. Better, but still a wee bit snugger then I'd like in the thighs - especially when I have the same season pants which are borderline baggy in a size 6. Overall I like the shorts and the 7" length is great. Can wear a climbing harness especially if just belaying clients. Also great every day short/hiking short. Just order w/ caution on sizing. Definitely go up 1 size for the shorts. Normal size for the pants.
Crazy life mom
San Diego, CA