Please note this is a skinny collar for Petite breed. Same style for Small to Medium breed is available in another listing of ours Skinny collar with width of 0.55" or 15 mm Stone on the collar is about 0.2" in diameter or 5 mm Length measurement XS : From Start of leather to middle hole is 8", from middle hole to tip is 3" more,total 11" S: From Start of leather to middle hole is 10", from middle hole to tip is 3" more,total 13" M: From Start of leather to middle hole is 12", from middle hole to tip is 3" more,total 15" Best is to compare with a collar you are currently using to find the best size to fit. Light weight: average weight of the collar is 2 oz.