Gardman Usa 8500 29-1/2-Inch by 17-1/2-Inch Easy Change Doormat Strong decorative rubber tray well Wide range of inserts in tough PVC backed coir sized to fit the tray well Inserts simply drop into tray to give a new mat look instantly Requires a Gardman Easy Change Insert 17-1/2-Inch by 29-1/20-Inch with 9-Inch by 20.9-Inch well