All necklaces are 1 inch handmade fused glass with 16 inch leather cord. Images are from a set of cir. 1840 entomology books I found in France. I've been wearing mine for about a month now and my 1 year old has yet to destroy the necklace, although she tries her best by tugging on it several times a day. Email me if you have question, special requests, or would like to carry these in your storefront.