A GIANT 30m tape measure wrapped around a huge inflatable brain formed part of the launch for a Hampshire-based charity’s campaign highlighting why head measurements are so important in infancy.

How far can you stretch a measuring tape before it buckles? The answer probably depends more on the tape than the user, but it does show how sturdy the coiled spring steel rulers can be.

Measuring tape is springy—you can bend it any way you want and it goes back to its original state. It's also made of steel, which is both robust and durable, as well as thin enough that it won't ...