The 50/50 knee has an adjustable top strap that can be removed when stretched-out , a replaceable knee cap system that is velcroed into position and a bottom velcro strap that can be cut to suit the skater.
Exite 50-50 Knee Pads - Details:
Measure up 10cm from the centre of the knee-cap and around the leg circumference. This length will determine the sizing.
Small sizing 35cm – 38cm
Medium sizing 38cm- 42cm
Large sizing 42cm- 46cm