These football boot tools help with the questions a size chart does not answer: how wide your foot is, which size to pick and why a boot pinches. If you already know what you want, the boot finder gives you a shortlist straight away.
If you do not have boots yet, begin with your foot width: a sheet of paper, a pen and a ruler will do. Measure in the evening, in your playing socks, then enter the numbers in the foot width calculator and take the result to the boot finder.
Torn between two sizes? The between two sizes tool considers the material too. If you already own boots that hurt, start with where do my boots pinch, which tells you the likely cause and the first fixes. Switching brands? The size converter puts UK, EU, US and centimetre sizes side by side.
The tools give you a starting point, because every foot and every last is different. If you have pain that does not go away, see a GP or a podiatrist.