If you are really interested in seeing the parents, you could try contacting the
breeder, tell them you have acquired one of their adorable puppies with whom you had "an instant love connection", and can hardly stand waiting to see what he might look like all grown up...so, "pardon my intrusion, but," and then inquire if they have a website where you can see photos of sire and dam, or perhaps they would be willing to email you photos of them, or, "gosh, it would just be heavenly if I could visit your kennel and see the sire and dam in person"... If they are unwilling to comply with any of your requests, you have lost nothing...you still have your heart's desire...probably chewing on one of your 'good' shoes...or ripping toilet paper to shreds...or...!
I see no point to mentioning your dog's current weight in your request 'cuz a dog's gonna get as big as he's gonna get...no one can give you a guarantee, and there are additional factors besides heredity that influence size, such as food...hormones given to the animals that comprise the feed, etc.
Good luck to you and your new little one...and put up some pictures, please!
