Sizing is something most breeders can't agree on. You will find a lot of breeders size their Goldendoodles differently. There are no official size guidelines. This is how I size my puppies. Adult sizes are just an estimate. Usually, the estimate will be accurate within 3-5 lbs. I do my best to give an accurate size prediction. I can not guarantee size, many complicated factors determine how big a puppy will be as an adult including genetics and environment.