Letter J bookmark is an innovative take on the regular bookmarks we buy from the stores.
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We only need a Tarpaulin which we cut from promotional ads scattered around the block. It measure 3.5" x 1.5".

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Fold the tarpaulin lengthwise, smooth-en one side by cutting.

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Start cutting the big letter J by following the edge at 1/3" width and stopping half inch before the top.

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Reverse and cut out the second J from the middle and stop half inch before the top.

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Clear the middle by removing it. And your output will look like the picture shown.

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This is the big letter J.

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The second and smaller letter J.

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Looks like a regular bookmark when the letter J cannot be seen but when you open the book you see creativity.