The template, J-347, will contain an assortment of heart sizes, plus more shapes. These Gem-Temp plastic templates are made of heavy duty plastic and should last a long time. (Stock J-347) Heart shaped cabochons are unique and not found often, so try your hand at making these cabochons. Either drill for a spot for a jump ring and chain, or use a fold over-bail for attaching the heart cabochon to a chain. Great for any special occasion for those special people in your life!