Spark by Ergodriven | The Perfect"Start Standing Now" Standing Desk (Medium) Choose your size by your height: | Under 54 = Small | 54-511 = Medium | Over 511 = Large | Feel better! Standing is a healthier position than sitting, and allows for more movement. Spark is the perfect way to try standing. Its ergonomic, robust (no typing wobble) and looks great. Ergonomic two-level design works great with a laptop, monitor, or all-in-one PC like iMac up to 27. Easily get healthier while you work! Spark is the best health and fitness investment you can make.