Cardstick ? A Ruler for your Wallet that Requires Zero Space

This is one of those “why didn’t I think of that…” ideas. The Cardstick is a set of 3 vinyl stickers that you can wrap around the edge of one of your existing credit cards. The stickers do not interfere with the normal operation (swiping) of your card and will provide a 3 inch ruler [...]

Source: http://the-gadgeteer.com/2011/08/25/cardstick-a-ruler-for-your-wallet-that-requires-zero-space/

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