Lihit Lab Teffa Bag in Bag - Size A5 (10" X 7.1") - Brown

This is an unbelievable organizer. I use it by itself, not inside a bag, and it is perfectly fine. On the inside of the main/notebook pocket I keep an older kindle fire (7.25" x 4.75" x .45") and a notebook (7.25" x 6.45" x .75"). This pocket can fit notebooks with a paper size up to 6.5" x 9.15". In the two flap pockets I keep smaller objects like wax for braces and earbuds. The larger flap pocket can fit objects smaller than 4.75" x 4.25". The smaller flap pocket fits objects smaller than 4.75" x 3". The pen pocket will not fit thick pens, and will not let irregularly shaped pens slip inside. I keep a Pilot Petit1 in the pen pocket, which slides right inside due to the streamlined shape. The two no-flap pockets are the same size and can fit items smaller than thinner than 4". Height does not matter because items can stick out of the top of the pocket. I keep my cell phone (5.5" x 3") in one of the no-flap pockets.

It seems as though no matter how much you put in this bag, it will keep nice and flat. That is why I love it!