These slippers are really cute but the sizes are not accurate.  At the time I purchased these my granddaugther wore a size 2 shoe and was just 6 months, they were too small!  She hates to keep socks on thus the reason for slippers. Alot of the reviews said get the next size up but like I said she was just starting to wear a size 2, so I figured this size would be right.  Still on a search for slippers for her but I'll keep these, the next grandchild will be here in August.  My best advise is even if you think you know the right size shoe go a size up on Acorn slippers.