Customize our innovative 10"-diameter spot markers for any game, sport, station or activity! Create-A-Spots have a foam backing bonded to a PVC top surface that"s compatible with most write-on, wipe-off markers, sold separately.; ; Note: These spot markers are designed primarily as a visual aid. They are not designed for use as a base or a marker that will be continuously stepped on.; ; Not all brands of write-on, wipe-off markers will wipe off completely, if required, use water or a mild cleaner like Windex to remove markers completely.