Hi Dixie, I'm not Joyce, but I found this online. . A size #3 pin is 2-inches long. . A size #2 pin is 1-1/2-inches long. . A size #1 pin is 1-1/16-inches long. . A size #0 pin is 7/8-inch long. . A size #00 pin is 3/4-inch long. Cathy