Protect your walls while playing darts with this dart board protector. The 1" thick EVA foam will ensure that errant darts will not damage your walls. The ring provides 2.8 square feet of protection ensuring unmarked walls. Easy to use, simply put the pieces together like a puzzle then stretch over the board for a snug fit. The outside diameter is 28.3" and the inside diamter is 17.7" to fit a standard size dart board. The protector is reversible so if one side has a lot of dart marks, simply flip it over and use the other side which makes the protector usable for countless dart games. By Trademark Innovations.