The standing desk riser should allow you to set the height at the best ergonomic positioning for your body when sitting and standing. To measure the ergonomic sitting or standing height for your body, you should sit or stand flat footed and extend your arms at a 90° angle, then drop your forearms a couple of inches so your fingertips touch the surface of the desk riser. Both of our Cooper Standing Desk Converter and Cora Standing Desk Converter are designed to meet these ergonomic standards so you can work comfortably when seated or standing throughout the day.