Mat doesn't come with a Base. You need to purchase Large Slipp-Nott base (28" x 29") separately.,Mat specs: 26" x 26" with 50 Sheets, with the proprietary S-N radiused corners,Remove dust, dirt and wax build-up from athletic shoe soles with one quick action..When the top sheet gets too dirty simply peel off the dirty top sheet for clean new sheet.,Typical basketball/volleyball game usage is 2-4 sheets.