"I was stuck on an airplane with the incredible need to design this prototype to 3d print as soon as I got home. It was impossible to get a sense of scale, proportion and to get the correct measurement without a reference. That day I decided that I would never be without a ruler again. That's when the idea for this wallet was born."
Both Metric and Inches ruler in the same wallet.
The Dimension Wallet is made out of Tyvek and it is virtually indestructible, incredibly thin and light. RFID protection.