Wisemen trading Glass Fabric Pattern Sewing Cloth Weights 4 Pack Large These weights make cutting out a paper pattern faster and easier then using pins. They also help preserve the integrity of tissue patterns. The paper pattern should last longer. Ultra smooth glass to help weights slide without causing wrinkles. Pack of 4, Lead free, Food grade soda glass weights. Measures about 2 3/4" X 1/2 to 3/4" weight about 5 to 6 oz. Weight patterns to fabric without using pins Ultra smooth to help weights slide without causing wrinkles You can see markings through them because the wieghts are made of glass.