Note: Please allow 1?2cm error due to manual measurement. Thanks for your understanding. specification: Item Type: Under Desk Footrest_x000D_Material: Memory Foam_x000D_Size: Approx. 40 x 20 x 10cm / 15.7 x 7.9 x 3.9in_x000D_Function: Lift your foot or leg slightly to improve circulation and prevent hyperactive legs and numbness. Features: 1Reduce Pressure: Leg rest helps lift your legs enough to take pressure off your spine and keeps your feet super comfy for the whole working day. 2Improve Circulation: Foot rest has a massaging texture design, which is not easy to slip off and can effective improve blood circulation in your legs. 3Relieve Soreness: Foot rest cushion can provides additional support to reduce pressure and relieve soreness caused by sitting for a long time. 4Turn Over Use: Under desk footrest is a semi circular shape, can be turned use to move your ankles, decreases foot swelling and tingle. 5Keep Aligned: Desk foot rest will keep your spine perfectly aligned, alleviating pressure from your lower back and shoulders. PackageList: 1 x UnderDeskFootrest