What Does mmHg Mean?
When shopping for compression socks, you'll notice a number followed by "mmHg" — for example, 15–20 mmHg or 20–30 mmHg. This stands for millimetres of mercury, the unit used to measure the pressure the sock applies to your leg. The higher the number, the firmer the compression.
Common Compression Levels Explained
- 8–15 mmHg (Mild) — Light everyday support. Great for people who sit or stand for moderate periods and want to prevent minor fatigue and swelling.
- 15–20 mmHg (Moderate) — The most popular level for everyday wellness. Ideal for travel, long work shifts, mild varicose veins, and general leg fatigue. This is the sweet spot for most people.
- 20–30 mmHg (Firm) — Medical-grade compression often recommended by doctors for moderate-to-severe varicose veins, post-surgical recovery, lymphoedema, and DVT prevention.
- 30–40 mmHg (Extra Firm) — Prescribed for serious venous conditions. Should only be worn under medical supervision.
Is 15–20 mmHg Right for You?
For most healthy adults, 15–20 mmHg is the ideal starting point. It provides meaningful circulatory support without feeling overly tight. You'll feel the difference after a long flight, a full day on your feet, or an intense workout — less swelling, less fatigue, and legs that feel genuinely refreshed.
This level is commonly recommended for:
- Travellers on long-haul flights or road trips
- Nurses, teachers, retail workers, and others on their feet all day
- Pregnant women in their second and third trimesters
- Athletes looking to speed up recovery
- Anyone experiencing mild leg swelling or varicose veins
When to Go Higher
If you've been diagnosed with a venous condition, your doctor may recommend 20–30 mmHg or above. Always follow medical advice when managing a diagnosed condition — compression socks are a powerful tool, but the right level matters.
Shop JoyfulLegs Compression Socks
All JoyfulLegs compression socks are crafted to deliver precise, consistent pressure so you get the full benefit of every mmHg. Browse our Spring Collection or explore styles designed for healthcare professionals.
