Don't let this chart put you off, it's really very simple to find your perfect size. All you need to know is your height and your weight. Once you've got that, find your weight on the top scale (you can measure it in stone, kilos or pounds). Then find your height measurement along the side scale on the left (measurements in either feet and inches or centimetres). Find where the points meet on the chart, and the area you land in is the size that you need.