These numerals are printed on heavy paperboard and feature a sandpaper texture that is extremely well bonded to the card so that it will not rub off over time.  Each figure has directional arrows to ensure the proper formation of the number. The cards measure 11 cm x 7 cm (about 4 1/4" x 2 3/4") and 11 cm x 14 cm (4 1/4" x 5 1/2") and come in a handy storage box with removable top.