Kaffe Fassett Pattern Weights are just dense enough to hold the pattern in place on the fabric. Pattern weights are vital to safely keep delicate pattern segments in place while you measure, cut, and prep your project pieces. The Kaffe Fassett Pattern Weights come in a quantity of 4 (2 of each print), measure 1/4" by 2" (5 mm thick, 5 cm diameter), and weigh 2.65 oz (75g).