gcc size of types

As the size of the types is not close in the standars of C, if not that there are a maximum and minimum size for them, I would like to know where I can find how gcc interpret this.

Where is in gcc documentation the size of the types they will take? Is there specify?I can not find that information, so i would like a few of help with it.

Thanks in advance.

--- Conclusions ---

Looking into all your comments, I finally get the information in this links to argue the answer

5.2.4.2.1 Sizes of integer types : http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1336.pdf

http://gcc.gnu.org/onlinedocs/gccint/Type-Layout.html