A tailpad on your skimboard is almost a must.
You will feel directly when your foot is or not on the center of the board ( over the Arch) in case it is not the board will not lay flat and loose speed.
I give tons of grip, more than wax and when your back foot is against the tailblock you feel you are on the back of the board.
Ideal is the combination with an Arch bar on the front of the board.
Eden tailpads are by purpose made of ONE PIECE, 37 cm wide and 35,5 cm long.
The larger surface sticks better to the board and holds better an longer.
They will fit on 95% of all boards, surf, skim and wake boards.
In case you want another shape or divide it, you can easily cut it with a sharp knife.