Our small soft scratch brushes have 4 rows (3/4" wide) by 17 rows (3-1/4" long) of fine .003" diameter wire that measures ¾" in height set in a 8" long wood handle. These brushes are available in both brass and steel. Our larger soft brass scratch brush has 4 rows (7/8" wide) by 19 rows (4-3/4" long) of fine .004" dia. brass wire that measures 1" in height set in a 13" long wood handle.