Sorry, I don't have anything to get the exact measurements of the bag. I used an 8"x11" paper to get an estimate and the bag is about 7-8" tall and wide (excluding handle). In the first picture, there's a belt on the side, which you can also use as scale so that you have an idea of its size.
The bag is most likely pleather material, but I'm not exactly sure. The only tag this bag has doesn't include the material info.