2ft x 2 ft 3/4 inch wide. These are like new, and they hook together through the plywood grooves to create a raised floor for stuff in a basement that might get wet otherwise. All 18 are sold as a set, together. We had them in our basement and luckily we never had water in the basement after we bought them, because the rain only got in once, before we bought them. We now moved and don't have an old Duluth basement, but I'm sure someone out there could use them. They are normally $8 a piece, so 18 would cost $144