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.

Step 1Circumference

Find your size from your measurements in this table.

Measure	Small	Medium	Large	X-Large	2X-Large
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"

Small

Ankle Circumference 17–22 cm6.5"–8.5"

Calf Circumference 28–42 cm11"–16.5"

Medium

Ankle Circumference 21–26 cm8"–10"

Calf Circumference 31–45 cm12"–17.5"

Large

Ankle Circumference 23–29 cm9"–11.5"

Calf Circumference 33–49 cm13"–19"

X-Large

Ankle Circumference 28–38 cm11"–15"

Calf Circumference 43–58 cm17"–23"

2X-Large

Ankle Circumference 33–43 cm13"–17"

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

Step 2Length

Then measure your length to choose Short or Regular. Your size is your Step 1 size in that 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".
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: 4.5384617 / 5 from 13 reviews.

AI Generated Review Summary

Summary topics

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

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)

Great socks

"Just as described"

— Tammy W. (5/5)

I have been wearing these

"I have been wearing these socks in the winter for the past 2 winters. They are comfortable, warm and feel wonderful on my legs."

— Nancy F. (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)

Well Worth It At Thrice The Price

"A devil to put on but angelic in relief. Will NOT do without them. 2 pair of the 20-30 and two pair of the 15-20 and alternate days to wear tight and not as tight. Legs have not felt this good for twenty years or more."

— Terrence G. (5/5)