Standard DeckProtect square sizes are made from 1/16″ aluminum sheet formed into tray-like frames. They have two layers of tiles made from volcanic rock fiber and are fitted with hard rubber feet that will raise the frame 1/2″ above your deck or patio to allow airflow and help to ensure that your deck or patio surface will not become stained from trapped moisture. Strong enough to support the weight of a wood burning fire pit and the fire wood within it. The Standard version provides the same level of protection for your deck or patio as the Premium. Available in unfinished milled aluminum only. Inside dimensions are 31.5″ x 31.5″.