Large floor model that can produce slabs up to 36"W x 52"L. Maximum slab thickness is 7/8". Includes one 1/4" plain shim, one 1/4" shim with canvas and a 1/8" plain shim. Assembled dimensions: 49"W x 76"L x 40"H. IMPORTANT: because the amount of clay and mechanical pressure produced rolling a large slab, the middle of the bed may bow slightly, creating a slab that is thinner on the sides. This is more evident when rolling thinner slabs -- from 1/2" to 3/8". Its effect on thicker slabs is not as evident. A great slab roller for large projects. Those looking for thin, consistent slabs, may want to purchase a smaller model.