I used guitar straps for the handles as they are cheap, well made, insanely adjustable, and come in a variety of colors and patterns. The actual sack part measures about 12x15 inches. I built it this way because I have a habit of carrying so much shit around with me, its insane. So, this fits my laptop and accessories, and a notebook. It's perfect for a natural mess like me! Comes with a leather pencil case.