It's like a pillow, I love it so much! It fits a book (about the size of a Love Yourself album) and it still has space left for more. The zipper is good quality, it moves with no hiccups and it has not broken on me, which sadly happens very often. The inside is spacious, it also has a little pocket with the embroidered character that is about the size of a deck of playing cards, a little bit bigger. I love the look of koya, they look very funny and cute. The embroidery is also great, with no loose threads or anything. Finally, the strap is big enough so it doesn't hurt if you carry it for a long while, but not too large to be uncomfortable for your hand. Definitely recommend it, if you ever want a portable pillow this is the bag