Understanding Compression Socks Levels: Which One Is Right for You?

Compression socks apply varying levels of pressure to the legs, which help improve circulation, reduce swelling, and alleviate discomfort. The level of compression is typically measured in millimeters of mercury (mmHg), and each level serves a different purpose, from providing light support to managing severe conditions. Whether you are travelling, working long shifts, or suffering from edema, choosing the correct compression level is crucial for comfort and effectiveness.

From very mild to extra firm, compression socks are available in various levels, and each level addresses specific health needs. In the following sections, you will learn which compression level is best for your condition, whether you are dealing with swelling, varicose veins, or recovery after surgery.

What Level of Compression Socks Do You Need?

You may need different levels of compression socks depending on whether you are easing mild swelling, improving circulation, or managing more severe leg conditions. Lower levels (8-15 mmHg) provide light support for daily comfort, while higher levels (30-40+ mmHg) are for more serious leg issues. Each level serves a specific purpose, from relieving minor fatigue to managing conditions like varicose veins and edema. Compression socks for nurses, for example, typically fall in the 15-30 mmHg range to help with long hours on their feet. Understanding the right level is key to comfort and effectiveness. In the following sections, we will explore the benefits of each compression level, from very mild to extra firm.

Very Mild (8-15 Mmhg)

Offering 8 to 15 mmHg of pressure, very mild compression socks provide a light level of support to relieve mild leg fatigue or slight swelling. These are ideal for everyday use, travel, or when standing or sitting for extended periods. Crew length compression socks are particularly popular as they gently support the feet, ankles, and lower calves during daily activities.

Very mild compression socks are ideal for:

  • Relieving mild leg fatigue
  • Preventing slight swelling from prolonged sitting or standing
  • Providing comfort during travel, especially on long flights
  • Offering light support for general leg discomfort
  • Improving circulation during low-impact activities

Mild (15-20 Mmhg)

Mild compression socks, offering 15 to 20 mmHg of pressure, are considered entry-level for most people. They are perfect for relieving mild swelling and light varicose veins, especially for those who spend long hours on their feet, such as nurses, retail workers, or travelers.

Mild compression socks are useful for:

  • Reducing mild swelling from prolonged sitting or standing
  • Alleviating light varicose veins and reducing the risk of deep vein thrombosis (DVT)
  • Preventing varicose and spider veins in pregnant women
  • Offering relief from leg discomfort during travel
  • Enhancing circulation for individuals who experience mild fatigue or discomfort

Medium (20-30 Mmhg)

Compression socks offering 20 to 30 mmHg of pressure are commonly prescribed by doctors for moderate to severe conditions like edema, lymphatic edema, varicose veins, and chronic venous insufficiency. Medium compression socks are especially useful for athletes, helping to enhance performance and speed up recovery by reducing muscle fatigue.

Medium compression socks are suitable for:

  • Managing moderate swelling and edema, including lymphatic edema
  • Providing relief for those with chronic leg conditions
  • Alleviating moderate varicose veins
  • Supporting recovery after surgery or injury
  • Reducing discomfort from prolonged standing or sitting
  • Treating orthostatic hypotension (sudden blood pressure drop when standing, causing dizziness)

Firm (30-40 Mmhg)

Firm compression socks are medical-grade socks prescribed for serious leg conditions like severe edema, severe varicose veins, deep vein thrombosis (DVT), and chronic venous insufficiency. These socks provide the strongest compression at the ankles, which improves circulation and reduces significant swelling.

Firm compression levels of 30-40 Mmhg are used for:

  • Treating severe edema, varicose veins, and deep vein thrombosis (DVT)
  • Managing significant swelling and chronic venous insufficiency
  • Supporting post-surgery recovery for severe conditions
  • Healing venous ulcers
  • Managing Stage II lymphedema

Extra Firm (40-50+ Mmhg)

The extreme pressure of 40 to 50+ mmhg provided by extra firm compression socks is for extreme leg conditions only. These socks should only be used under medical advice due to the high risk of discomfort and the intense pressure they apply on the legs and ankles.

Extra firm compression must only be used for:

  • Managing extreme cases of edema, acute leg swelling, and chronic venous insufficiency
  • Supporting post-surgical recovery, especially after vein surgery
  • Providing support for serious circulatory conditions
  • Treating chronic venous ulcers
  • Offering maximum compression for extreme vascular issues

Compression socks size chart. Only chart will appear in this section.

Size (AU)

Ankle Circumference

Calf Circumference

Thigh Measure

Small (AU 6-8)

18 - 21 cm

28 - 38 cm

40 - 62 cm

Medium (AU 8-10)

21 - 25 cm

30 - 42 cm

46 - 72 cm

Large (AU 10-12)

25 - 29 cm

32 - 46 cm

54 - 78 cm

X-Large (AU 12-14)

29 - 31 cm

34 - 50 cm

60 - 81 cm

What Level of Compression Socks Do You Need for Flying?

You need compression socks offering 15 to 30 mmHg of pressure for air travel. Most people benefit from mild compression (15-20 mmHg), which helps prevent leg discomfort and improves circulation during long periods of sitting. However, if you frequently suffer from blood clots or significant swelling, medium compression (20-30 mmHg) provides better support , reduces the risk of DVT, and enhances comfort on long-haul flights.

What Level of Compression Socks Do You Need for Nurses?

Nurses need mild or medium compression socks with 15 to 30 mmHg of pressure to help with leg discomfort during long shifts. Mild compression (15-20 mmHg) is effective for reducing leg fatigue and minor swelling, but nurses with longer shifts benefit more from medium compression (20-30 mmHg). This stronger compression provides extra support, which alleviates the heavy, pressured feeling in the legs caused by hours of standing.

What Level of Compression Socks Do You Need for Pregnant Women?

For pregnant women, mild compression socks are ideal for managing common discomforts. Mild compression (15-20 mmHg) helps relieve mild swelling, tiredness, and aching legs, making them perfect for daily wear and travel. If you feel the need for higher levels of compression, it is important to consult with a healthcare provider to ensure they are suitable for your specific health conditions.

What Level of Compression Socks Do You Need for Swollen Feet?

If you have swollen feet, you may need compression socks offering 15 to 40 mmHg of pressure, depending on the severity of the swelling. Mild compression (15-20 mmHg) is suitable for light swelling during travel or pregnancy. For moderate swelling or medical conditions, medium compression (20-30 mmHg, firm) provides more support. In cases of severe swelling, it is recommended to consult a doctor, as you may require 30-40 mmHg or higher, which needs strict medical supervision to avoid overpressure.

What Level of Compression Socks Do You Need for Edema?

Depending on the severity of edema, you may need medium to firm compression socks. Medium socks offering 20-30 mmHg of pressure are effective for moderate edema, while severe edema or lymphedema requires 30-40 mmHg of pressure for comfort. For extreme cases, higher medical-grade compression may be required under a doctor's supervision. Always consult a physician to ensure proper use, as incorrect compression can worsen edema.

What Level of Compression Socks Do You Need for Varicose Veins?

Medium to firm compression socks (20 to 40 mmHg) are effective for alleviating discomfort caused by varicose veins. They improve circulation, reduce swelling, and provide support for those with moderate varicose veins, helping manage symptoms and prevent worsening of the condition.

What Level of Compression Socks Do You Need for DVT?

You need medium to firm compression socks (20 to 40 mmHg) to effectively alleviate discomfort from varicose veins. For moderate varicose veins, 20-30 mmHg improves circulation and reduces swelling. However, for serious varicose veins, 30-40 mmHg socks provide stronger support to manage symptoms and prevent progression.

Where to Purchase Compression Socks?

Compression socks can be purchased from online retailers, pharmacies, and medical supply stores, each with its own pros and cons. Online stores often offer a wider selection and competitive prices, but it can be difficult to assess fit and quality without trying them on. Pharmacies, on the other hand, provide the convenience of in-person shopping, though their selection may be more limited and expensive. Medical supply stores often offer specialized advice and a broader range of medical-grade options, but they come at a premium cost.

When purchasing compression socks, it is essential to check for proper sizing, return policies, and product reviews to ensure a good fit and quality. Consider stores like Funky Socks, which offer stylish yet effective compression socks that combine comfort and fashion with proven functionality. Always ensure the socks match your specific compression needs and seek advice if you are unsure about the best fit.

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