1/2 Inch pink ground protection boards for sale-HDPE black . 20-50 mm pink ground protection boards for sale-HDPE high large size Ground nstruction mats 20-50 mm for apron-HDPE Ground Protection Mats Temporary nstruction Site They range in size from 6 to 8 feet long ways and 2 to 4 feet in width. Most are 1/2 inch thick.