Sleepheep M5 Mini 5-hole Silver Wallet Diary
It's a popular silver binder that can be opened and closed with a tick, and the pink and silver combination is lovely. There are many places where you can store cards, so you can use it like a wallet. Diary size: 10 cm * 13 cm * 3 cm Used or perforated interval: 19 mm (based on perforated center)