Such a cute necklace - I bought it during the first launch and had to send it in for repair because the open clasp was soldered to the necklace so any snag would pressure it to open. They fixed it right up and polished so you can't even tell (demonstrating in last photo). I have too many charms now so I want to pass it along to someone who will wear it more than I do! I would say because the clasp is small, you don't want more than 3 small charms or 1-2 larger ones.