Different brands do have have variations in pad sizes. This is a rough quide on how to measure for your pads, and should work for most brands. Measure from where your shoes laces are tied, upto the middle of your knee. Use this figure to see what size you are in the chart below. Brands include, Kookaburra. Salix, Chase, Ton, Gunn and Moore, Gray Nicolls, Newbery.