Here is a list of common can sizes. Let us know if you can find a pattern here....

Common Can Sizes Size # Weight Cups Servings 1/4 4 oz 1/2 1 3/8 6 oz 3/4 1 1/2 8 oz 1 2 1 picnic 10-1/2 oz 1 1/4 2 to 3 211 12 oz 1-1/2 3 to 4 300 13-1/2 oz 1-3/4 to 2 3 to 4 303 15-1/2 oz 2 4 2 20 oz 2-1/2 5 2-1/2 28-1/2 oz 3-1/2 7 3 33-1/2 oz 4-1/4 8 3 cylinder 46 oz 5-3/4 10 to 12 5 56 oz 7 14 10 103-1/2 oz 13 25