SKU: 503NS1O77
Sigvaris Natural Rubber Unisex Open Toe Thigh High 30-40 mmHg w/ Grip Top
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Description
Sigvaris Natural Rubber delivers 30-40 mmHg graduated compression in a Thigh w/Grip-Top style with a Open Toe design. Ideal for patients with more serious indications.
Key Features
Medical Benefits
Clinical Applications
Product Specifications
Indications & Contraindications

Sigvaris Natural Rubber (500) Size Chart
Specialty
Tap any measurement below to see your full size details.
| Measure | Small | Medium | Large | X Large |
|---|---|---|---|---|
| Ankle Circumference | 19–23 cm7.5"–9" | 23–30 cm9"–12" | 30–40 cm12"–15.5" | 40–46 cm15.5"–18" |
| Calf Circumference (Average) | 28–38 cm11"–15" | 32–43 cm12.5"–17" | 36–48 cm14.5"–19" | 45–57 cm18"–22.5" |
| Calf Circumference (Full) | ≤43 cm≤17" | ≤48 cm≤19" | ≤57 cm≤22.5" | ≤68 cm≤27" |
| Calf Circumference for 505C (Full only) | 32–43 cm12.5"–17" | 36–48 cm14.5"–19" | 45–57 cm18"–22.5" | Not available in XLNot available in XL |
| Thigh Circumference (Average) | 41–54 cm16"–21" | 48–61 cm19"–24" | 58–71 cm23"–28" | NANA |
| Thigh Circumference (Full) | ≤61 cm≤24" | ≤71 cm≤28" | ≤81 cm≤32" | NANA |
| Thigh Circumference for 505T (Full only) | ≤61 cm≤24" | ≤71 cm≤28" | ≤81 cm≤32" | NANA |
| Hip Circumference Guidelines | <122 cm<48" | <137 cm<54" | <155 cm<61" | NANA |
| Measure | Short | Long |
|---|---|---|
| Calf Length | ≤40 cm≤15.5" | >40 cm>15.5" |
| Leg Length | ≤71 cm≤28" | >71 cm>28" |
Size codes: Numeric size codes combine letter + column number: 1 = Average calf, Short; 2 = Average calf, Long; 3 = Full calf, Short; 4 = Full calf, Long. Small S1–S4, Medium M1–M4, Large L1–L4, X Large X1–X4.
- 505C (knee-high) is available in full calf only; not available in X Large.
- 505T (thigh-high) is available in full thigh only.
- Thigh, hip, and 505T measurements are not printed for X Large; chart states: Custom sizes available. Please contact customer care for details.
Measure first thing in the morning, before swelling, with a soft tape measure held level. Applies to: Natural Rubber 500 Knee Highs, Thigh Highs, Pantyhose. Step-by-step Measuring Guide →
Measuring Guide for Sizing of Compression Stockings
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" 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.









