Medical

Compression Socks OEM Guide for 15 to 30 mmHg Programs

Published: 2026-06-29By ZheSock TeamReading time: 6 min

Buying a 15 to 30 mmHg compression sock program is a technical purchase, not a logo purchase. If ankle pressure is off by 2 to 3 mmHg, or calf grading is too wide, you can get failed fit checks, high returns, and marketplace claims. A useful custom compression sock manufacturer should give you exact targets early. Ask for pressure band by size, yarn blend, machine setup, MOQ by color and size, sample timing in days, and the price gap between 15 to 20 mmHg and 20 to 30 mmHg. If they stay vague, walk away.

Table of Contents

1. Which compression band should you launch first
2. How 15 to 30 mmHg compression socks are actually made
3. Materials and knit construction that affect pressure most
4. How to verify mmHg before you approve bulk
5. Normal MOQ, prices, and lead times for OEM compression programs
6. How to choose a custom compression sock manufacturer for medical programs

Which compression band should you launch first

Most first programs start with 15 to 20 mmHg or 20 to 30 mmHg knee highs. For general retail, 15 to 20 mmHg is usually the safer opening range. It fits travel, office wear, long standing work, and daily support. Return rates are often lower because the fit window is wider and first-time users tolerate it better.

20 to 30 mmHg is stricter. It needs tighter size grading, better pressure control, and clearer package instructions. If you sell online, size chart errors in this band get expensive fast. A sock may feel fine in a fit session, then fail after washing if ankle pressure drops or the cuff digs into the calf.

Do not approve one broad size set if the calf range is too wide. For many importers, a better opening setup is 3 foot sizes with 2 calf ranges.

Small foot, EU 35 to 38, calf 28 to 36 cm
Medium foot, EU 39 to 42, calf 32 to 40 cm
Large foot, EU 43 to 46, calf 36 to 44 cm

Ask the factory to define the full pressure curve, not only the ankle band. A common target for a 20 to 30 mmHg program is about 22 to 28 mmHg at the narrow ankle point, then lower pressure through the calf. If a custom compression sock manufacturer cannot show target points by size, they are not ready for a serious medical category order.

How 15 to 30 mmHg compression socks are actually made

Compression socks are built through yarn choice, stitch density, and controlled yarn feeding. Artwork comes later. Common single-cylinder hosiery machines for this category run at 168N, 176N, or 200N. Needle counts are often 144, 156, 168, or 200, based on size and fabric density. For a firmer 20 to 30 mmHg style, factories usually use a tighter structure and more stable elastane feeding than for a 15 to 20 mmHg style.

A normal factory process looks like this.

Confirm yarn spec, color, and blend. 2 to 3 days with stock yarn, 5 to 7 days with dyed yarn.
Create the knit program and first trial. 2 to 4 days.
Make 3 to 5 trial pairs per size. Check flat measurements, stretch, and pressure. 2 to 3 days.
Revise the program if ankle pressure or calf drop is out of range. 1 to 2 days.
Bulk knitting. 7 to 15 days, based on volume and machine loading.
Toe linking, boarding, pairing, and trimming. 3 to 5 days.
Final inspection, metal check if required, packing, and carton sealing. 2 to 4 days.

That puts normal sampling at 7 to 14 days. Bulk lead time is usually 25 to 40 days after sample approval and deposit. In peak season, bulk can move to 45 days.

Ask about boarding temperature and dwell time. Compression socks can shift after boarding if the setting is too aggressive. Many factories board at about 110 to 130 C for synthetic-rich constructions, then cool before packing. This matters. Wrong boarding can distort length and pressure.

Materials and knit construction that affect pressure most

Compression comes mainly from elastane working inside a nylon-based structure. Cotton does not create stable graduated pressure by itself. Because of that, most reliable 15 to 30 mmHg programs stay high in nylon and elastane.

Common blend ranges for knee-high compression socks are below.

15 to 20 mmHg, about 72 to 78 percent nylon, 18 to 22 percent elastane, 2 to 8 percent cotton or polyester
20 to 30 mmHg, about 68 to 75 percent nylon, 20 to 28 percent elastane, 2 to 8 percent cotton or polyester

If cotton content climbs too high, pressure consistency often drops after repeat wear and washing. That is why many medical programs keep cotton low or skip it.

Buyers also ask about GSM. In socks, factories usually control by pair weight and stitch density instead of garment GSM. For importer comparison, a typical adult knee-high 15 to 20 mmHg sock often weighs 55 to 75 grams per pair. A denser 20 to 30 mmHg sock is often 65 to 90 grams per pair, depending on size and yarn count.

Construction points that matter most are simple.

Reinforced heel and toe to reduce early wear-through
Controlled welt opening so the cuff does not roll or dig in
Tighter ankle stitch density than mid-calf
Size-specific calf circumference, not one cuff for all sizes
Smooth toe linking, with many buyers setting a raised seam limit of 1.5 mm

If you want recycled content, ask whether GRS yarn is available for the nylon portion. Then test pressure again on the finished sock. Recycled yarn can work, but the mmHg claim must still be checked on production samples.

How to verify mmHg before you approve bulk

Never approve compression socks by appearance alone. You need size-by-size pressure data and wash stability data. At minimum, ask for test results on the narrow ankle point, the calf, finished leg length, foot length, cuff circumference, and changes after washing.

A practical preproduction checklist looks like this.

Measure every size flat. Keep key leg point tolerance within plus or minus 1.0 cm.
Test pressure on at least 3 pairs per size, not 1 pair only.
Wash test 5 cycles at 30 C or 40 C according to the care label, then recheck measurements and pressure.
Review colorfastness for dark colors, white grounds, and contrast logos.
Check cuff recovery after stretch. Weak cuffs cause top-edge slipping complaints.

For bulk inspection, many importers use AQL 2.5 for major defects and AQL 4.0 for minor defects. Compression styles usually need a tighter standard on pairing and measurements than fashion socks. Major defects often include wrong size label, obvious pressure mismatch within a pair, holes, broken elastane, wrong color, and serious toe seam problems. Minor defects can include small yarn floats, slight shade variation within approved limits, or incomplete trimming.

Ask the supplier what they record during in-line QC. A useful report should show machine number, operator, size, pair count checked, ankle and calf measurement points, and defect count by type. If they only say final inspection is done, that is too late. Pressure problems start on the machine.

For skin-contact confidence, many buyers ask for OEKO-TEX yarn options. For factory system control, ISO 9001 also matters if the supplier actually works under it.

Normal MOQ, prices, and lead times for OEM compression programs

MOQ depends on yarn sourcing, number of sizes, packaging, and whether the yarn is stock or dyed. Development MOQ can be lower than bulk MOQ. Keep those numbers separate in your cost sheet.

Typical ranges in China for knee-high compression socks are below.

Development sample run, 100 to 300 pairs total
Bulk plain color with stock yarn, 500 to 1,000 pairs per color
Bulk with several sizes and custom retail box, often 1,000 to 3,000 pairs total per style
Printed belly band, barcode sticker, or insert card, usually no extra MOQ when added to bulk, though carton count may need to stay fixed

Typical FOB China price ranges at 3,000 to 10,000 pairs total are below.

15 to 20 mmHg knee high, standard nylon and elastane, simple design, about USD 1.20 to 2.20 per pair
20 to 30 mmHg knee high, denser knit, more size splits, stricter QC, about USD 1.80 to 3.20 per pair
Gift box or printed paper box, add about USD 0.18 to 0.60 per pair based on box size and print coverage
PE bag with label, about USD 0.03 to 0.08 per pair

Main cost drivers are clear. More elastane costs more. Higher needle count can slow output. More size splits add setup time and inspection time. Dark custom colors may require dyed yarn instead of stock yarn. Retail packaging adds material cost and packing labor.

Sampling is usually 7 to 14 days after artwork, target compression band, size chart, and packaging layout are confirmed. Bulk is usually 25 to 40 days after sample signoff and deposit. If you need third-party lab testing before shipment, add about 5 to 7 days.

How to choose a custom compression sock manufacturer for medical programs

Do not start with the cheapest quote. Start with the technical sheet and the defect standard. A supplier that cannot discuss machine count, pressure checks, and size grading in plain numbers will struggle later.

Use this supplier checklist.

Can they make both 15 to 20 mmHg and 20 to 30 mmHg with actual size-specific pressure records
What machines do they use for compression styles, 168N, 176N, or 200N, and how many are available
What is the normal needle count for your target style, 144, 156, 168, or 200
Can they support pilot orders of 100 to 300 pairs before larger production
Will they share in-line QC points, final AQL standard, and top defect list
Do they offer OEKO-TEX yarn options, and are they audited under BSCI or Sedex if your compliance team asks for it
Can they keep packaging lots, size stickers, and carton labels separated by size and color without mix-ups

Ask one blunt question. What percentage of their output is compression socks, not regular sports socks. If compression is only a small side business, expect a longer learning curve and more fit revisions.

The right custom compression sock manufacturer should also be honest about claim limits. They can produce to a target pressure band, but they should not promise medical claims that are not backed by your documents, market rules, and final test data. Good suppliers know where production ends and product claims begin.

Frequently Asked Questions

What is the practical difference between 15 to 20 mmHg and 20 to 30 mmHg for an OEM buyer?

15 to 20 mmHg is usually easier to launch. It has a wider fit window, lower return risk, and simpler grading for travel and daily support retail. 20 to 30 mmHg needs tighter control of ankle pressure, calf reduction, cuff recovery, and size chart accuracy. At normal OEM volumes, it often costs about USD 0.40 to 1.00 more per pair.

What MOQ should I expect from a custom compression sock manufacturer?

For development, 100 to 300 pairs total is common. For bulk, plain color styles often start at 500 to 1,000 pairs per color. If you split into many sizes or use custom boxes, practical MOQ often moves to 1,000 to 3,000 pairs total per style. Ask if MOQ is counted by style, color, or size.

Which materials are most stable for 15 to 30 mmHg socks?

Most stable programs use nylon as the main body yarn with 18 to 28 percent elastane, based on the pressure band. Cotton is usually kept at 2 to 8 percent because higher cotton content can reduce pressure retention after wear and washing. If recycled content is needed, ask for GRS nylon options and retest the finished sock.

How long does OEM production take from sampling to shipment?

Sampling usually takes 7 to 14 days after the factory receives the artwork, size chart, target mmHg band, and packaging brief. Bulk production usually takes 25 to 40 days after sample approval and deposit. Add 5 to 7 days if you require third-party lab testing or more complex retail packaging.

What QC standard should importers use for compression socks?

A common final inspection standard is AQL 2.5 for major defects and AQL 4.0 for minor defects. For compression socks, also require size-by-size pressure checks, flat measurement tolerance within plus or minus 1.0 cm on key points, wash testing for 5 cycles, pairing checks, and defect limits for toe linking, broken elastane, holes, and wrong size labels.

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