Here is an app connected tiny printer that lets you put your logo and designs on stickers and everything else. The poooli Thermal Pocket Printer comes with iOS, Android, and Windows support. It runs on a 1000mAh battery. You can use it for your notes, lists, and everything in between.
This printer measures 3.3 x 3.3 x 1.5 inches. You can find out more about it here.