I bought one size larger (band size and cup size) and glad I did. The fit is fine. There is just one annoying thing about this sports bra: on the inside there is a seam on both sides that must have been trimmed to close--there are tiny threads that poke out. They become VERY itchy especially when sweating. I like the bra but wouldn't buy it again for that factor. I might purchase a different style but I'd have to be sure there wasn't an inside seam.