Does anyone know the outside measurements for these bags? I believe for the Rush 24 front to back when packed it's like 13 inches when it's full right? What about like halfway? Also what is the size for the rush 12 from to back? I found the inside measurements but I need more of an idea. The rush 12's look like their about the same size of a normal school backpack, is that right? I'm not sure if that's big enough more me.