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SKU: 553CM1O77/S
Sigvaris Secure Unisex Open Toe Knee High 30-40 mmHg
$95.96
$95.96
$119.95
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HSA/FSA accepted.
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Description
Sigvaris Secure Unisex Open Toe Knee High 30-40 mmHg delivers Extra Firm Compression for lower-leg containment, featuring enhanced containment and comfort at higher compression levels with open-toe flexibility
Designed for higher-level compression with a secure fit, the Sigvaris Secure Knee High stocking, often just called a compression sock, provides 30-40 mmHg of graduated compression in an open toe style, in a unisex fit. Part of Sigvaris' Secure line, it's made with a durable knit built for enhanced containment and comfort at Sigvaris' higher compression levels, with a signature silicone dot grip top for a secure, all-day fit. A practical choice for wearers who need higher-level compression with a secure, all-day fit. Sigvaris has been 100% family-owned since its founding in Switzerland in 1864, a heritage that continues to guide its commitment to medical-grade compression quality.
Key Features
Medical Benefits
Clinical Applications
Product Specifications
Indications & Contraindications
Sigvaris Secure (550) Size Chart
Specialty
Tap any measurement below to see your full size details.
Do not base your size on your shoe size. Medical compression garments require precise ankle and calf measurements to work correctly. Please use your exact measurements on the chart below to find your perfect fit.
👆 Tap a value in the table to highlight your size.
Circumference
| Measure | Medium | Large | X Large | XX Large |
|---|---|---|---|---|
| Ankle Circumference | 21.5–25.5 cm8.5"–10" | 25.5–29 cm10"–11.5" | 29–33 cm11.5"–13" | 33–37 cm13"–14.5" |
| Calf Circumference (Average) | 31–45 cm12"–17.5" | 35–49 cm13.5"–19" | 41–56 cm16"–22" | 45–59 cm17.5"–23" |
| Calf Circumference (Full) | 45–59 cm17.5"–23" | 49–63 cm19"–25" | 56–71 cm22"–28" | 59–74 cm23"–29" |
| Thigh Circumference (Average) | 51–69 cm20"–27" | 61–77 cm24"–30" | 69–85 cm27"–33.5" | 75–93 cm29.5"–36.5" |
| Thigh Circumference (Full) | 60–78 cm23.5"–31" | 68–86 cm26.5"–34" | 76–94 cm30"–37" | 84–102 cm33"–40" |
Medium
Ankle Circumference
21.5–25.5 cm8.5"–10"
Calf Circumference (Average)
31–45 cm12"–17.5"
Calf Circumference (Full)
45–59 cm17.5"–23"
Thigh Circumference (Average)
51–69 cm20"–27"
Thigh Circumference (Full)
60–78 cm23.5"–31"
Large
Ankle Circumference
25.5–29 cm10"–11.5"
Calf Circumference (Average)
35–49 cm13.5"–19"
Calf Circumference (Full)
49–63 cm19"–25"
Thigh Circumference (Average)
61–77 cm24"–30"
Thigh Circumference (Full)
68–86 cm26.5"–34"
X Large
Ankle Circumference
29–33 cm11.5"–13"
Calf Circumference (Average)
41–56 cm16"–22"
Calf Circumference (Full)
56–71 cm22"–28"
Thigh Circumference (Average)
69–85 cm27"–33.5"
Thigh Circumference (Full)
76–94 cm30"–37"
XX Large
Ankle Circumference
33–37 cm13"–14.5"
Calf Circumference (Average)
45–59 cm17.5"–23"
Calf Circumference (Full)
59–74 cm23"–29"
Thigh Circumference (Average)
75–93 cm29.5"–36.5"
Thigh Circumference (Full)
84–102 cm33"–40"
Length (Short vs Long)
| Measure | Short | Long |
|---|---|---|
| Calf Length | ≤41 cm≤16" | >41 cm>16" |
| Leg Length | ≤72 cm≤28.5" | >72 cm>28.5" |
Short
Calf Length
≤41 cm≤16"
Leg Length
≤72 cm≤28.5"
Long
Calf Length
>41 cm>16"
Leg Length
>72 cm>28.5"
Size codes: Numeric size codes combine letter + column number: 1 = Average, Short; 2 = Average, Long; 3 = Full, Short; 4 = Full, Long. Medium M1–M4, Large L1–L4, X Large X1–X4, XX Large G1–G4 (G = XX Large).
- Women's Shoe Sizes: Short Leg 5.5–9.5, Long Leg 8–12
- Men's Shoe Sizes: Short Leg 7–11, Long Leg 9.5–14
Need help choosing your size?
Our Certified Fitters are standing by. Mon–Fri 8am–7pm CST
📞 1-800-504-7315
Between sizes? Size down for a firmer therapeutic fit, or up for easier donning. It should feel snug — like a firm, even hug.
Wrong size? No problem. Easy exchanges — we’ll get you into the right fit.
Measure first thing in the morning, before swelling, with a soft tape measure held level. Applies to: Secure 550 Knee Highs, Thigh Highs. Step-by-step Measuring Guide →
Measuring Guide for Sizing of Compression Stockings
Sizing
Measuring Guide
How to measure your legs for compression stockings, support socks, support hose, and gradient compression hosiery.
Where to Measure
- For knee-highs: measure around your ankle and calf. Then measure the distance from the floor to the back of your knee.
- For thigh-highs and pantyhose: measure around your ankle, calf, and upper thigh. Then measure the distance from the floor to your upper thigh (bottom of your buttocks).
An important measuring tip: take your measurements with a tape measure, as shown below. Sizing charts are located on every product’s “see details” page for your convenience. If you need further assistance, please call 1-800-504-7315 or Live Chat with us.
How to Properly Measure and Apply Compression Stockings
The Key Measurements
Ankle
Measure around the ankle at the narrowest point, generally above the ankle bone.
Calf
Measure around the calf muscle at the widest part.
Length
Measure from the floor to the bend behind the knee.
Thigh
Measure around the thigh approximately 3 inches below the gluteal fold (crease of the buttocks).
Thigh Length
Measure the distance from the bottom of your buttocks to the floor.
Sizes may differ between various brands of support stockings—each manufacturer has their own sizing chart. A medium in one brand may not be a medium in another, and some brands offer petite (shorter) lengths while others do not. Knowing your measurements will ensure you get compression hosiery that fits properly and comfortably. Sizing charts are located on every product’s “see details” page.
Please call 1-800-504-7315 or Live Chat if you need more help sizing.
Measured up? Find your exact size
Take your measurements straight to our interactive brand charts, or convert a size you already know into another brand.
Interactive size charts Size converter (switch brands)
Frequently Asked Questions
What conditions is Secure designed for?
Does this fit larger thighs?
Will this feel uncomfortable against my skin?
Will this hide my varicose veins?
Is this a firm compression garment?
Overall rating: 3.0 / 5 from 1 reviews.
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