Here are the classes of tomatoes that burpee uses:
•Slicers and Beefsteaks: Large up to two pounds, includes Great Hybrids. Beefstake, and the Classic Giants
•Cocktail: Medium size, 2-4 ounces
•Early Birds: Small, ripens early
•Paste: Cooking variety (Roma)
•Cherry & Grape: Small, up to an inch
•Patio: Small plants, designed to be grown in containers
•Specialty: Unique varieties