Spot On® Vinyl Floor Markers Help Students Quickly Identify Where To Sit Or Stand. These Floor Markers Stay On Strong But Can Be Removed Easily And Used Again And Again. The Write-On/Wipe-Off Surface Is Perfect For Writing Student Names Or Numbers. The Vinyl Markers Attach Firmly To Vinyl, Wood, Smooth Tile, Gym Floors Or Other Smooth Surfaces. 4" Diameter. 2 Each Of 6 Colors; 12 Per Pack.