The Sigvaris Secure (550) Size Chart from the Specialty line. Toggle inches/cm and tap a measurement to highlight the right size from Sigvaris' official fitting data.
Sigvaris Secure (550) Size Chart
Specialty
Tap any measurement below to see your full size details.
👆 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 →
