I ordered this bag and measured it. The real size is 9" Wide x 8" Tall x 3.75" Thick. (That's measuring each of the panels from seam to seam.) If you flatten it and pull out the sides you can get it to 13" wide.

The two front pockets aren't deep enough to hold pens; however, they will hold a smartphone or iPod classic. The main compartment fits a full sized iPad comfortably.

That said, it appears to be of good quality. The canvas is heavy, and the strap can be adjusted quite long.