In 10-gauge brass shells my old UMC catalogues offer 2 5/8, 2 3/4, 2 7/8, 3, and 3 1/4 inch. In paper cases for black powder they offer 2 5/8, 2 3/4, 2 7/8, 3 and 3 1/4 inch. In paper cases for bulk smokeless powders they offer 2 5/8, 2 3/4, 2 7/8, 3 and 3 1/4 inch. In paper cases for dense smokeless powder UMC offered 2 5/8, 2 3/4, 2 7/8 and 3 inch.