These Replacement Pyramid paddles are approximately 3 7/8 inches long (100mm) and 1 1/4 inches wide and about 1/16" thick. The nub part (that fits into a hub) measures about 5 mm in diameter and is about 1" long and the slot is about 1/16". You are buying a set of 6 unsanded, unassembled nubs and paddles. Note: to assemble you will need to glue the nub to the paddle, you will need to lightly sand the paddles edges. Made in Germany.