22"x21"x5/8" Ten-Sided Kiln ShelfFor top loading kilns 23 inches wide wall to wall. (Skutt 1027, L&L e23T, Cress E-27, Cone-Art 2327) These kiln shelves are manufactured of a high refractory mullite/cordierite clay body that yields a smooth, durable surface for stacking ware in your kiln. They are available in a variety of shapes and sizes.