Factory Drum Brake Size?

Hey guys, need some help. My car (1968 Plymouth Valiant Signet 4DR/Slant Six 225) is currently at my brother's garage as I don't have anywhere to store it at my condo. Does anyone know what size the factory drum brakes are (front and rear)? Unfortunately I didn't measure them and if I'm going to make the 2 hour drive, I'd like to do so with parts in my hands to install. Any help would be appreciated as I'd like to order the parts. Thanks guys!