Core-Spun by Therafirm Knee High Socks Size Chart

Core-Spun knee high socks (solids, patterns, cushioned) — 10-15 / 15-20 / 20-30 / 30-40 mmHg

Tap any measurement below to see your full size details.

👆 Tap a value in the table to highlight your size.

Circumference

Measure	S	M	L	XL	XXL
Ankle Circumference	17–22 cm6.5"–8.5"	21–26 cm8"–10"	23–29 cm9"–11.5"	28–38 cm11"–15"	33–43 cm13"–17"
Calf Circumference	28–42 cm11"–16.5"	31–45 cm12"–17.5"	33–49 cm13"–19"	43–58 cm17"–23"	47–65 cm18.5"–25.5"

S

Ankle Circumference 17–22 cm6.5"–8.5"

Calf Circumference 28–42 cm11"–16.5"

M

Ankle Circumference 21–26 cm8"–10"

Calf Circumference 31–45 cm12"–17.5"

L

Ankle Circumference 23–29 cm9"–11.5"

Calf Circumference 33–49 cm13"–19"

XL

Ankle Circumference 28–38 cm11"–15"

Calf Circumference 43–58 cm17"–23"

XXL

Ankle Circumference 33–43 cm13"–17"

Calf Circumference 47–65 cm18.5"–25.5"

Length

Measure	Short	Regular
Floor to bend of knee	41 or less cm16" or less	over 41 cmGreater than 16"

Short

Floor to bend of knee 41 or less cm16" or less

Regular

Floor to bend of knee over 41 cmGreater than 16"

Fits calf up to 25.5".
Catalog has no separate Cushioned chart; Cushioned knee highs use this chart.
Compression is the mean compression for an average ankle size.

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: Core-Spun knee highs, Core-Spun Patterns, Core-Spun Cushioned. Step-by-step Measuring Guide →

Frequently Asked Questions

What makes Therafirm Core-Spun Patterns 20-30 mmHg Knee High Compression Socks – Closed Toe different?

Therafirm Core-Spun Patterns 20-30 mmHg Knee High Compression Socks – Closed Toe provide firm 20-30 mmHg graduated compression that is greatest at the ankle and decreases up the leg. Comfort designed top is non-restrictive while staying in place all day. High-tech fibers wick away moisture.

What does 20-30 mmHg mean, and what does it help with?

20-30 mmHg is firm graduated compression: pressure is greatest at the ankle and decreases up the leg. In these knee high socks, it is often recommended by doctors for varicose veins and moderate swelling, and may help relieve tired, aching legs. Talk to your doctor about whether 20-30 mmHg is right for you.

How do I know I’m ordering the right size?

Measure your ankle and widest calf area and check the garment length if the size chart requires it. Compare the results with the size chart for this exact product before choosing a variant. If you fall between sizes, use the brand’s fitting guidance rather than guessing.

How do I put these on and take them off?

Put the garment on when your legs are dry. Turn it inside out to the heel, guide your foot into place, and work the fabric gradually up the leg without pulling on the top band. Smooth out wrinkles; do not fold or roll the upper edge. To remove it, ease the fabric downward in stages. If gripping or applying the garment is difficult, consider donning and doffing aids, including application gloves and stocking donners.

How should I wash and care for this garment?

Therafirm lists this style as machine washable. Its general garment-care guide recommends hand washing in cool or lukewarm water with a mild detergent to help protect the fibers. Do not bleach, wring or iron; lay flat, line dry or drip dry away from excessive heat. Check the garment label for any style-specific directions.

Overall rating: 4.3333335 / 5 from 9 reviews.

AI Generated Review Summary

Summary topics

Review topics: ["feel","look","price"].

Review highlights

Reviews

Cromwell sock review

"They are attractive and right compression. It is not long pants season and I would not wear them with shorts."

— Pete M. (5/5)

Therafirm socks are comfortable to

"Therafirm socks are comfortable to wear and are true to size! A little wider toe area would be good in future socks."

— Nikki (4/5)

These are socks, but I

"These are socks, but I have circulation problems. I like the styles offered and I hope they work as well as other Core spun stockings. They feel great. I can't call them a great buy great price or whatever, they are comfortable."

— Paul S. (5/5)

Look good and will take

"Look good and will take them with me to PV, Mexico"

— Itsde (5/5)

expensive but great to have

"expensive but great to have a cottony feel and the compression I need."

— Kris (5/5)

Wearing the socks first time

"Wearing the socks first time today. Comfortable, easy to put on, and warm."

— Joann F. (5/5)

I like the fit and

"I like the fit and feel of these but what I ordered was too small. /compressionsale has been good about processing a return/reorder for the next size up. I am anxious to try these when thy arrive."

— Louise B. (3/5)