Standard size golf hole for putting on the beach! just hold the top of the cup and “drill” down, removing sand as you go, use the holes in the base to run it down the last little bit, clean up the edges and you have your own personal putting practice spot on the beach. normal flag fits diagonally on bigger printers (Cr-10, P1S, ect.) and short flag should fit diagonally on standard ender 3.