Compression stockings have a range of numbers to indicate how much graduated compression the garment has. The standard compression levels for compression stockings are 15-20 mmHg (over the counter), 20-30 mmHg (medical class 1), 30-40 mmHg (medical class 2) and 40-50 mmHg (medical class 3).

The right compression socks for every day, non-medical needs should be 15-20 mmHg or 20-30 mmHg if you have a job that requires standing all day. Most people choose mmHg compression that best fits their needs or activity.