Griff's gang hoverboards BTTF

I know there are a lot of posts about hoverboards on here and I've been digging through them and can't find the information I need so if I missed it, I'm very sorry about another post. But i'm looking if anyone has the dimensions for the 4 hoverboards of Griff and his gang. There is a ton of info for Marty's board, but I want to make all 5 eventually.

Thank you so much.

 

I just want to say... that is a fantastic tattoo you have there.

 

thank you. I have a full BTTF sleeve now.

 

Kool, would like to see your BTTF sleeve, upload a pic!!

I was at the London Film and Comic Con last weekend, this pic is not great quality and will give probably give you no help what so ever, but I thought I would share as relevant