If you’re like me and have a penchant for measuring things but rarely have a ruler on hand, then you’ll definitely like the Cardstick. It’s a 3″ vinyl sticker with inches and centimeters markings that transforms a credit card (or phone, notebook, basically anything) into a ruler. For only $3.99 (free shipping!) you get 3 Cardsticks (clear, yellow and white). Check out Cardstick’s website to learn more and place an order. I want one!