Approximately 12 x 18 cm This is a multi-purpose pouch. Use it for your bankbook, medical record book, lottery tickets, mother and child health handbook, etc. You can put anything in it! It doesn't take up much space, so it won't be bulky in your bag. I'll offer a small discount for bulk purchases. This is a handmade item by an amateur. Please understand this before purchasing. I have other handmade items for sale. Please take a look if you'd like (^.^) It will be sent via standard mail. #pouch #bankbook holder #medical record book #mother and child health handbook case #flat pouch