i'd go slightly smaller. it's generally easier to size up a smaller frame (mostly the stem and seatpost), but difficult to impossible to make a larger frame fit smaller. maybe more accurately, a frame can readily if wonkily and oddly, extend to adapt to a longer person, but quickly meets a limit for a shorter person since the adjusting bits are limited by the frame's fixed size.

measure for your legs and then adapt the bike for your monkey arms? just kidding about the monkey arms.