This is a striking and unique clasp - the little froggy goes through the hole in the lily pad to and sits there to make the hooked clasp stay closed. It doesn't even look like a closure much - just a really cool decorative element.
Know why frogs are always happy? They eat what bugs them.
Is is a toggle clasp, or a hook and eye? Hard to say on this one - it has features of both.
20mm x 27mm By the each.