Nice size!

This is a good sized bag for travel-- it will fit under the seat of a plane, and has handy upper carry handles, too!  What is really nice is that the top opening has a wire frame on it, so it stays open when you are filling it.  It's just a little detail that makes it extra.  There is a sleeve for laptop, and the arm straps can be made quite long-- which is good as my shoulders are quite thick and sometimes standard backpacks don't loosen enough to fit me.  It's medium sized, not for mountaineering or anything-- and bigger than a purse.  But good for travel and it has a strap on it to slide it down over your luggage pull handle, which will really be handy!