The bag is smaller than described (as others have said), but it's just the size I want and need.
It seems well made, of decent materials.  The fabric is moderately heavy.  There is double stitching in the probable high stress locations (connection of strap, etc.)
Actual dimensions (see my pics too);  7.75" high,  6.75" wide,  2.25" thick.  The strap is 59" (max length).
Note that it has rounded corners.
It has two compartments.  The 'front' one (as seen in the main pic) is 1.75" thick.  It has a zippered pocket on the front/outside that is about 5.5" deep.  Note that the zipper opening is only 4.5" wide.
On the other side of the zippered pocket (in the main compartment)  is an open pocket, about 4" deep.
The 'back' compartment is about 1/2" thick.  The 'front' side of it has open pockets for eyeglasses and pens (3).  The 'back' side the compartment has a zippered pocket; about 6" deep.  Note that because of this zipper, you should be careful putting a phone in the compartment - put the screen away from the zipper.
The back panel of the bag has some (foam?) padding in it.
The outside of the back panel has another zippered pocket; 6" deep.
The bottom of the bag has 3 layers, and the middle layer seems heavier than the others.