Center Cut Craft Seashells - Black Terebra Sliced shells measure approximately 1.25"-2.25" each and come in a 100 piece bag for crafts. Bring the beach home with one of our unique seashells, offered in a variety of sizes. Whether it's a souvenir from a recent vacation, decorative accent for any room, or part of your coastal craft, these high-quality shells are some of the lowest prices around.