What types of armrests come on office chairs, and does the type matter?

Armrests range from fixed (one position, no adjustment) to 4D — adjustable in height, pivot, forward/back position, and rotation. For most office users, height-adjustable (1D) or 2D armrests give enough flexibility to set elbows at 90 degrees with forearms level. For intensive keyboard and mouse users, 4D armrests allow the most natural wrist and forearm alignment throughout the day. FindOfficeFurniture.com specifies armrest type and adjustment range on every chair — call 888-719-4960.