Which Level of Compression Socks Do I Need?

Besides scrubs, Compression socks are one of the most important parts of a nurse's wardrobe. When you're on your feet for 12 or more hours at a time, gravity is constantly working against your circulation, which can leave your legs feeling tired, heavy, or swollen by the end of a shift. Compression socks help counter this by applying graduated pressure to your lower legs, encouraging blood flow and supporting overall comfort.

Compression socks come in several different pressure levels, measured in mmHg, each suited to different needs. Below, we break down the main grades to help you figure out which one might be right for you.

8-15 mmHg (Mild)

This is the lightest level of compression, designed for everyday comfort. It's a good starting point if you're mostly looking to reduce the tired, achy feeling that comes from a long day on your feet, or if you want some extra support during periods of standing or sitting for extended stretches.

15-20 mmHg (Medium)

This is the most common entry-level grade for compression socks, and a popular starting point for anyone new to wearing them. It offers a bit more support than the mild level, making it a good fit for long shifts, travel days, or any day where you're on your feet for hours at a stretch.

20-30 mmHg (Firm)

This grade offers a noticeably higher level of support than the first two. It's generally recommended for people who need more consistent compression throughout a demanding day, though this level is worth discussing with a healthcare provider first, especially if you're considering it for a specific health concern.

30-40 mmHg (Extra Firm)

This is a significantly higher level of compression, and it's best used under the guidance of a healthcare provider. If you're simply looking for everyday comfort and support, the mild or medium levels are typically a better starting point.

40-50 mmHg (Rx)

This is the highest level of compression sock available, and it should only be worn under a doctor's direction.

Finding Your Fit

Most nurses find that mild (8-15 mmHg) or medium (15-20 mmHg) compression socks offer plenty of everyday support for long shifts on their feet. If you're dealing with a specific health concern or aren't sure which level is right for you, it's always worth checking with a healthcare provider before choosing a higher compression grade. For more on how compression socks work and how to get the most out of them, see our guide on how long you should wear compression socks.