If you have trouble adjusting to your Mac or Apple Display, you might be interested in HiRise adjustable stand that comes from Twelve South. This stand comes with internal metal support shelf that allows you to adjust the height of the stand and your Mac at the same time, simply by positioning the support shelf to one of the six predefined internal positions.
As for the stand, it’s designed to be compatible with all iMac and Apple Display models with an L-shaped stand. In addition, this stand is also compatible with 27-inch iMac and Thunderbolt display.
HiRise stand has a lot to offer, and as for the price, this device is priced at $79.99.