One and a half to two units, because of their backpacks? Sigh. When I started taking public transit with a backpack (sometimes a very full pack), I made sure to get one that was built so that I could still take only one space with it.
Shameless Plug for Eagle Industries A-III-P-L Pack (http://www.eagleindustries.com/ProdDisp.asp?PartNoID=8). I got it in black, of course. Shameless Plug for Eagle Industries DETS Pack (http://www.eagleindustries.com/ProdDisp.asp?PartNoID=412), which I almost got instead.
Re: Oh you're going to LOVE this:
Shameless Plug for Eagle Industries A-III-P-L Pack (http://www.eagleindustries.com/ProdDisp.asp?PartNoID=8). I got it in black, of course.
Shameless Plug for Eagle Industries DETS Pack (http://www.eagleindustries.com/ProdDisp.asp?PartNoID=412), which I almost got instead.