Not got a tool and urgently need your ring size? You can try a printable ring size chart, like this one from Oliver Bonas – Greener advises that these methods can be tricky to do accurately ...

Given below is an online test for visual acuity using the E Chart, a chart with the letter 'E' in different directions (up, down, right and left) and sizes. This E chart visual acuity or eye vision ...