You’re eyeing a side table on a European furniture site, or a recipe from a UK baking blog calls for ...

Pull a credit card out of your wallet and lay it flat. That long edge is almost exactly the size ...

Pull an AA battery out of a remote control and you’re already holding the answer. 5 cm is about the ...

Hold a large pizza box flat in front of you, or picture the diagonal of a 15-inch laptop screen that’s ...