It is manual measurement, there may be 1-3cm error. And item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. Your understanding will be much appreciated.
QUANTITY: sold as only 1 PC
Material: high quality soft & elastic polyester fabric
CHARACTER: high quality light smooth & elastic polyester fabric, exquisite design technology, adopt unique hexagonal honeycomb to protect the stability of leg and knee muscles
DESIGN: nice workmanship, with honeycomb pad design to protect leg from crash, as well with anti slip band, no easy to fall off
APPLICATION: running, basketball, football, cycling, golf¡