Meet Sammie
Here's Tucker
I'm an F1 Golden Doodle
Tucker weighs in at 62 pounds and Sammie is 38 pounds. The approximate weight for these puppies could be 45-50 pounds. This is considered a 'standard size'. Again, this is only a guess as each dog is different and nothing can be guaranteed. F2B's can vary in coat types including loose-wavy, straight, and curly. An F2B is 62.5% Poodle and 37.5% Golden Retriever.
You might look at these two websites to learn more. F2B Explained and Wiki on Goldendoodles