The E Ink Ruler from Yan-Ting Chen is a must-have for any handyman. This tape measure converts inches to centimeters on the fly, letting you work longer and calculate less.
Why take time out of your day to convert metric units when the E Ink Ruler can do it for you? Although this tape measure is just a conceptual design, I for one would love to see this jump off of the Internet and onto store shelves.
Metric Conversion Tape Measures
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Tape Measure Masters
3/4" Ruler Bracelet
Measuring Tape Chronometers
Measuring Tape Toilet Paper