I'm not sure how the sizing on these work... my 8 1/2 month old is baaaaaaaaaaaaaarelly fitting into size 2 shoes, she has a wider foot.  It almost hurt me to pay $44 for shoes I knew she'd BARELY use since they grow so fast But my little one is on the verge of walking, so I really wanted to get her some shoes with support.  I ended up ordering her a 3.5 WIDE and they fit her PERFECTLY.  SHe's had these for almost a month and I feel they've been a tremendous help.  She stands on her own and is gathering up the courage to take her first few steps.  If you're on the fence about them, just do it.