Jan 15, 2016 · A #1 aggregate is a nominal size of 3 ½ to 1 ½ inches and a #8 aggregate is a nominal size of 3/8 to inch. More specifically, a #57 aggregate is the combination of #5 and #7 aggregates ranging from 1 to inch. Chaney Enterprises' aggregate materials meet the ASTM C 33 Standard and can be found at our various loions throughout ...