This is a thick and sturdy silicone loaf mold that weighs nearly 3 lb on its own. Originally designed to fit as a liner in the Crafter's Choice Wooden Long Loaf Soap Mold, you can use it as a stand alone mold but will need to support the sides from bowing. The natural color silicone is 1/4" thick on all sides. Inside Dimensions: 3 1/8" wide x 19 15/16" long x 3 1/8" deep. Holds 6.5 pounds of water.