Its depth is 15"; width on the bottom is 13", then widening to 16" at the top. Straps are 31 " long. Nice length to sling over your shoulder.
This style of bag is great for all sorts of reasons. Its great for carrying books (I see these at church, and I suppose people keep their notebooks or books in them). I also like to use this style as a handbag.
Leave a figure in the comments, and we'll announce the "winner" (I always think that's a bit lame, seeing as you still have to buy the thing....) at 8 pm cst.