$3 Bookmark front and back

[OPINIONS NEEDED]

I submit this to ask for your opinion
Should the text be "This book belongs to ..........." or "Property of ............." or something else? I'm not really good at English so I don't know for sure how you usually say it.

Thank you!

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ORDER HERE: gorse.storenvy.com/products/84…

Size: 4.5 x 14cm (1.77"x5.5")

Sold as a pack including one of America, one of England.

Price: $3

International shipping fee: $3

For each additional pack, shipping fee + $1.5

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I recommend using marker / pen that can write on slick surface to write your name. Ball-pen may work but it'll be a real struggle O m O )!
Warning: If you don't have that kind of marker / pen, it's best you leave them blank.

Hope somebody will buy