The standard brim of the Fedora #1 is 2.7" - 2.8" and their is no additional charge for this standard brim, but you can request a larger Or Smaller brim for any hat.
The final cost of your brim addition will depend on 2 major factors:
First your desired Grade of weave and second your desired Brim Size.
Smaller Brim Sizes are no charge, just List it in the comments box with your hat size
Be sure to See the Brim Additions page for further information