gosh, i swear i just read two reviews about these shoes here on this site, but now i can't find the thread! anyway, both girls went up in size! And i think they went up more than just one size. these are said to be very small in sizing! and you can always put an insole in it if it's a little too big.
When it comes to shoes in gerneral i think they are quite small, so always go for a bigger choice if your unsure about your size! When it comes to boots, choose one size even bigger if you wanna be able to wear warm socks. bodylins shoes are quite small and narrow! I have purchases several and so far all my shoes has been very small, even tho i order a size that normally is a bit big on me. (the old heart buckle shoes are the only exception, they were very big in sizing)