Always tell prospective buyers the truth. You don't want someone to buy your dog and become unhappy with them not being what they wanted. That puppy might very well end up as an outside dog, a stray, and eventually in a pound. If you feel they will be larger, you might want to add the size of the parents to your ad. You may not make any money on this but you character will benefit. Good luck on finding just the right "forever" home for your babies.
