civic hatchback/coupe rooftop dimensions

heey i'm a 15 year old kid who gets a drivers licence on his 17th(uk). my dad is helping me buying a honda civic coupe or hatchback. for modifications, my plan is buying carbon fiber resin, for the roof. the only think i need to know are the lengt and wide of the roof top.

thanks in advance

ps: my english isnt the best, cus im dutch but im learning it....

Odd request....
Car year so someone can help you better?

whoops totaly forget(sorry peeps)

its for an 1996-2000

sorry again!!