Mine are 3 by 4.5 and they are just a bit to tall so I will be editing them. I'd say 3 by 4 is perfect. There are tons of different sizes used though so its whatever you like.
Primary - Empty
Secondary - Empty
Bottle Conditioning - None
Drinking - Peanut Butter Oatmeal Stout, Barleywine, Saison, APA, Strawberry mead
In the Works - Summer Rye for my wedding, May 15, 2010