German Giant Cross?

I'm picking up a male Leucistic x Hypo Orange Pastel German Giant this coming Saturday. I was wondering how big German Giant crosses get? I would assume it would be larger than a normal. Does anyone have any fully grown GG crosses and how big are they? Thank you to all who reply!

i dont have one but do keep a lot of bd's. i have seen many. a big german giant is about 35% bigger than a regular bd. so i guess a cross would be around 15-20% bigger. best of luck hope to see tons of pics.