Create Instant Active Standing: VIVOs desk riser provides on-demand standing throughout the day for the freedom to get out of your chair and relieve muscle tension, reduce stress, and increase productivity -Patented- Space Efficient 28' Surface: The top surface measures 27.9 x 15.7, which will easily fit in your workspace. The 27.9 x 11.8 (11 in center) keyboard tray raises in sync with the top surface to create a comfortable workstation