I didn't know the snake necklace comes in a 60cm. In the booklet the biggest size is 50cm. Does your necklace hang low on you?My friend in pandora always recommends a double or triple leather for girls to get wear from as growing up... As can wrap around more times while smaller.
I recently got my necklace but for the exact reasons you described I went for the chain they do instead in a 60cm (I think) and I wear my London and Sydney charms on it xx