Orion,
I have had both and currently using the boa. Circumference at the widest portion is approx. 12 inches. Depth 4.5 inches and width at the widest section is 3 inches. Mine is the strap on, very secure and beautiful. No way it will loose its shape, these are made with great skill. I hold 4 broadheads with ease and large profile feathers. The small fry holds three but will cramp 4 arrows and with broadheads it is very tight. I don;t think you can find a better quiver and workmanship is as good as it gets. tom