· Crushed Stone #1: Approx. 2″-4″ Wide. Crushed stone grade no. 1 is the largest size with diameters ranging from around 2 inches to 4 inches. As this grade contains larger pieces …Udden-Wentworth Scale. According to the Udden-Wentworth scale can include dashes ('-') and can be up to 35 characters long.You can not select more than 25 topics Topics must start with a letter or number
