The case is a generous size, so it has plenty of room for not only my pens but pencils, erasers, pencil sharpener, staple remover & more in the main compartment. There is a detachable, soft divider down the middle of the main compartment, it have some extra organization of items or remove it to make one large space.
The outside fabric is a little bit stretchy so there is some give, which allows to really stuff it, lol. There is one interior pocket with a flap & “magic tape” closure which use for a few loose paper clips, rubber bands, postage stamps etc. An open, elastic mesh pocket is directly above that & holds a container of lead for mechanical pencils. There are 4 elastic loops attached to one side of a small flap between the two sides for items that used frequently, such as a red pen, black pen, mechanical pencil & highlighter. Since this case is also waterproof, can also see this as a good choice for storing makeup essentials, especially when traveling.