They are a bit inconsistent. On the smallish side, I'd say. The first pair I bought, I bought in my regular size but wore them completely differently than they were intended to be worn. They were supposed to be a slouchy drop waisted crop -- I wore them as high waisted crops. I'd have had to size up to wear as intended.
The second pair I bought I sized up one size and they are slightly on the snug side for my preferences. (Mind you, speaking perfectly honestly, I'm now between sizes so maybe it was going a half size up from my *true* size, if you know what I am saying.) But I tried the size higher than that and the pockets gaped in a weird way and they didn't look right.