BE GREEN with our all Rugged Constructed Outrigger Mats made from recycled/reclaimed materials 18'' x 18'' x 2.5'' All reclaimed 3'' x 4'' hardwood, reclaimed strapping, and all thread. 18'' x 18'' x 2.25'' Reclaimed 2'' x 4'' hardwood in between 2 layers of reclaimed plywood screwed together. Strapping is also recycled. 18'' by 18'' by 3'' 3''x 4'' hardwood reinforced with reclaimed plywood on both sides screwed together with recycled strapping Other sizes available upon request.