Purchased size 4s for my daughter when she was 9 months old.  They were big on her then, but stayed on well because of the velcro strap.  She skipped crawling and loved to walk everywhere holding fingers.  These shoes allowed me to take her on jaunts outside.  She is 15 months old now and walking on her own.  The 4s still fit and she wears them everywhere.  They're very easy to put on, even when she's a less that cooperative mood.  They still look practically new.  We chose the dinosaur print but the dinos are hard to distinguish since the shoes are so small.