Our Memory Locket charms vary slightly in size, so we can't say exactly how many will fit in each size locket. We do offer the following guide (although we can't guarantee that the charms you order will fit. If you end up with too many, we send the extras alongside in a little gift bag, and you can swap around the charms you have in your locket as often as you like).
Large Round Locket: 9/10 charms
Medium Round Locket: 4/5 charms
Small Round Locket: 2/3 charms
Heart Locket: 6/7 charms
Teardrop Locket: 9/10 charms
If you click on any locket and view the product information there'll be a guide to roughly how many lockets will fit comfortably.