Typically, when individuals think of workplace discrimination race, religion, and/or gender immediately come to mind.  However, some employees are facing discrimination due to their weight.  According to a recent article in Fast Company titled "The Hidden Discrimination Against Being Fat At Work":

Numerous studies have found that obese and overweight people experience all manner of discrimination at work, and much of it is perfectly legal. Some struggle to find a job at all. In recent years, employers like Victoria Hospital in Texas have explicitly stated that they won't hire anyone with a body mass index (BMI) of more than 35 (about 220 pounds for someone who is 5-foot-6), which is far from a foolproof predictor of good health.