maxpedition jumbo versipack The zipper for the concealed weapon is 9 1/2 inches. The depth of the compartment is 9 inches. I bought mine to get me to and from work as I commute by bicycle. It is big enough to carry my lunch, my gun, water, wallet and so on. I used to use a backpack but clearly you wouldn't be able to get to your gun in a hurry. no one would have a clue that you were carrying a pistol in this pack.
I actually just posted this reply on another thread but it fits here as well.
