This is [easy to write on!] Washi tapes 'message' by Hutte Paper Works, a Japanese brand that produces beautiful stationery and paper goods.
These tapes can be written over and stamped beautifully.
You can stick them on your notebook as a collage, add a message to your wrapping, and much more.
The perforations allow you to cleanly detach it by hand.

This product is not available for purchase by residents of Japan.
If you live in Japan, please purchase from Hutte paper works' online store.
本商品は日本在住の方はご購入頂けません。
日本在住の方はHutte paper works様のオンラインストアよりご購入ください。
https://huttepaperworks.shop/