Many  old recipes call for an ingredient by the can size.  I found these  conversions in some vintage cook books.  Many of my grandma’s old  recipes called for a specific dollar amount of an ingredient.  I wish I  had a conversion table for 5 cents of hamburger or 10 cents of pork  chops.  I had to go to the library and try and convert from old grocery  ads based on the approximate year.
- No. 1 can = 1 1/3 cups
 - No. 1 tall = 2 cups
 - No. 2 can = 2 2/3 cups
 - No. 2 1/2 can = 3 3/5 cups
 - No. 3 can = 4 cups
 - No. 10 can = 12-13 cups
 - No. 303 = 2 cups