Quick Guide to Choosing a Compression Level for Socks and Stockings
When buying medical compression, it helps to think of the pressure level as your "dosage." Just as a doctor prescribes a specific strength of medication to treat a condition, compression is offered in different strengths “dosages” measured in mmHg (millimeters of mercury) to provide a specific therapeutic effect. To learn more about mmHg, see our Compression Ratings Guide.
Choosing the right compression level ensures you get the relief you need while remaining comfortable throughout the day. Here is a quick look at what each level is commonly used for:
15–20 mmHg Compression (Mild)
Recommended if you have:
- ✓ Mild to moderate daily swelling
- ✓ Long periods of sitting or standing, including travel or flights
- ✓ You’re new to compression
- ✓ Preventative or comfort support
Not recommended if you have:
- – A prescription for higher compression
- – Significant or worsening swelling
- – Diagnosed venous disease requiring firmer compression
- – Recent surgery (follow clinician guidance)
Common mistake: Choosing 15–20 mmHg because it feels “safer” when firmer compression is actually needed.
20–30 mmHg Compression (Moderate)
Recommended if you have:
- ✓ Moderate swelling that benefits from firmer daily support
- ✓ Varicose veins, spider veins, or venous symptoms
- ✓ You’ve tried 15–20 mmHg and want stronger control
- ✓ You’ve been advised to wear “moderate” compression
Not recommended if you have:
- – A prescription for a different compression level
- – Known arterial circulation concerns (such as peripheral arterial disease)
- – Severe or rapidly worsening swelling
- – Recent surgery unless your clinician recommends this level
Common mistake: Assuming 20–30 mmHg is “too strong” for everyday wear—many people comfortably use this level.
Insurance Note: Most Canadian insurers cover 20-30 mmHg and above. If you have a prescription for this level or higher, you can typically use your benefits to cover the cost. See our Insurance & Reimbursement Guide for more details.
30–40 mmHg Compression (High)
Recommended if you have:
- ✓ Lymphedema or lipedema support
- ✓ Moderate to severe venous insufficiency
- ✓ Significant or persistent swelling that requires firm control
- ✓ A prescription or guidance to wear firm (30–40 mmHg) compression
Not recommended if you have:
- – Known arterial circulation concerns (such as PAD)
- – No prior experience with compression and no clinical guidance
- – Mild or occasional swelling only
- – Recent surgery unless specifically directed by your clinician
Common mistake: Choosing 30–40 mmHg for general comfort, when this level is intended for specific clinical needs.
The Keys to Choosing: Match Compression Level to Symptoms, Lifestyle, and Guidance
The best results come from finding the best match; where your compression level aligns with three key factors:
Choose a range based on severity. 15–20 mmHg is for mild fatigue and swelling. 20–30 mmHg or 30–40 mmHg are the clinical standard for more significant swelling, varicose veins, persistent aching, or edema.
Activity dictates support. 15–20 mmHg is ideal for travel or office work. For physically demanding roles (8+ hours on feet), 20–30 mmHg is the standard for leg health.
While lower levels can be selected for most people, higher levels (30–40 mmHg) should always be guided by a healthcare professional.
If you consider these three things, you will pick the compression strength that works in harmony with your body to keep your legs feeling healthy and revitalized.
Pro-Tip: Get the Most from Your Compression
Once you have identified the right level, the final step is ensuring an accurate fit. Proper sizing ensures the mmHg listed on the box is the exact pressure your legs receive. We recommend measuring first thing in the morning when swelling is at its lowest. For step-by-step instructions, see our Complete Guide to Measuring for Compression Socks or contact our brand-certified fitters for assistance.
How to Know if You’ve Chosen the Right Level
Regardless of the mmHg, your compression should feel like a firm, supportive hug, never a painful pinch. If you have matched the level to your needs correctly:
- ✓ Swelling in your ankles and feet should be controlled by the end of the day.
- ✓ The fabric should stay smooth against your skin without bunching or rolling.
- ✓ Your legs should feel significantly "lighter" and more energized.
Still not sure which level is right for you? Our brand-certified fitters are here to help. If you're not sure, ask our team for a personalized recommendation based on your symptoms or prescription.
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