3¼×1″ - use with ground rods or ¾ post or smaller

3¼×1¾ - use with Tee post, 1½ post or smaller

3¼×2″ - use with 1¾ post or smaller

3¼×2½ - use with Gate post & 2¼ post or smaller

3¼×2¾ - use with 2½ post or smaller