The simple labret is made from hand blown glass by gorilla glass. They're round T-backs with a total length of 1/2". All colors are made from soda-lime glass except for Crystal which is borosilicate glass. Cobalt, Emerald, Honey, Purple and Smoke have been discontinued and cannot be reordered. Glass colors vary from batch to batch. The Ruby labret you order may not look like the image on the website. Choose your size and color below.