Medical

Custom Maternity Compression Socks OEM Guide

Published: 2026-07-10By ZheSock TeamReading time: 8 min

A maternity compression socks OEM order needs tighter control than a normal sock order. A procurement team must define pressure, calf range, yarn, gauge, wash performance, packaging, label text, carton rules, and acceptance limits before bulk knitting. "Support socks for pregnancy" is not enough for an RFQ. The factory needs target mmHg, ankle and calf measurements, sock height, machine needle count, logo file, packing method, barcode rules, inspection level, and sample approval steps. Without those details, bulk pairs may look fine in the carton but fail on pressure, fit, scanning, or returns. Put the numbers in writing before the deposit is paid.

Table of Contents

1. Start with compression level and claim wording
2. Choose yarn, gauge, and construction for wash recovery
3. Build sizing around ankle and calf data
4. Plan MOQ, sampling, and bulk timing before launch
5. Use realistic price targets and know the cost drivers
6. Set inspection rules, wash tests, and packing checks in writing

Start with compression level and claim wording

Most retail maternity compression socks use 15 to 20 mmHg. This range suits daily support during sitting, travel, desk work, and long standing. It is also easier for pregnant users to pull on than a firmer sock. A 20 to 30 mmHg product gives stronger pressure and needs clearer user guidance. If the sales page, box, or insert mentions treatment, prevention, blood clots, varicose veins, edema, or any medical condition, check the rules in your target market before production.

Pressure is not controlled by one setting. It changes with covered spandex count, machine tension, sock circumference, foot length, boarding temperature, and size grading. A change from 70D to 100D covered spandex can shift pressure by about 2 to 5 mmHg, depending on the knit structure. A shorter leg can also raise pressure at the calf. That is why an RFQ should ask for pressure data by size, not one average number for the full order.

Common daily maternity target: 15 to 20 mmHg at the ankle
Firmer support target: 20 to 30 mmHg at the ankle
Typical knee-high flat length before boarding: 38 to 44 cm for adult M to XL
Pressure check points: ankle, lower calf, and widest calf area
Suggested acceptance: ankle pressure within the labeled range, calf pressure lower than ankle pressure
Sample approval rule: test at least S, M, and XL, not only size M
Risk control: reject a size if the calf pressure is higher than the ankle pressure

Use plain claim wording unless your compliance team has approved stronger language. "Maternity compression socks, 15 to 20 mmHg" is easier to control than "medical socks for swelling relief." The product itself may be the same, but the claim can change document needs, label review, and sales risk.

Choose yarn, gauge, and construction for wash recovery

For maternity compression socks OEM, stretch recovery matters more than a thick hand feel. A practical base blend is 65 to 78 percent nylon, 12 to 22 percent polyester, and 8 to 15 percent spandex. Nylon gives strength and a smoother knit. Polyester helps with color cost. Spandex creates pressure, but too much can make the sock hard to put on.

Cotton can be used for comfort positioning, but high cotton content makes compression harder to keep after washing. If the sock must hold stable pressure after repeated wash cycles, nylon with covered spandex is usually the safer construction. A common fabric weight for knee-high compression socks is about 180 to 280 GSM, depending on yarn count, gauge, and leg length.

144N machine: better for thicker yarn and warmer socks
156N machine: balanced choice for plain daily support products
168N machine: finer surface and clearer logo or pattern detail
Common covered spandex options: 70D, 100D, 140D, selected after pressure sampling
Comfort top band: usually 3 to 5 cm, with less bite than a standard sports welt
Toe option: linked toe for a flatter seam feel, or normal toe for lower cost
Heel option: reinforced heel for longer wear, or standard heel for a lower unit price

A tight top band is a common mistake. It may hold well in a fitting room but leave marks at the upper calf after four hours. Pregnancy swelling changes the fit. The top welt should pass both stretch checks and wear checks, not only a flat measurement check.

Set practical acceptance criteria for material performance. After 5 wash cycles at 30°C, the sock should keep the approved shape, show no broken elastic yarn, and stay within agreed width and length tolerances. A useful rule is plus or minus 0.5 cm for key widths, plus or minus 1 cm for total height, and no more than about 10 percent loss from the approved pressure result unless your brand sets a tighter limit.

Build sizing around ankle and calf data

Shoe size alone is a weak way to grade maternity compression socks. The pressure profile is driven mainly by ankle circumference, calf circumference, sock height, and calf shape. A buyer selling into the US, EU, or Australia should review customer body data before choosing S to XL only. If many customers have calves above 45 cm, add XXL instead of forcing XL to cover too wide a range.

A workable size chart should include foot length, ankle circumference, widest calf circumference, and recommended sock height. The heel pocket must sit in the right place. If the heel climbs up, ankle pressure moves, and the sock can feel tight in the wrong area. Fit failure often starts here.

Example S target: ankle 19 to 22 cm, calf 30 to 36 cm
Example M target: ankle 21 to 24 cm, calf 34 to 40 cm
Example L target: ankle 24 to 27 cm, calf 39 to 46 cm
Example XL target: ankle 27 to 30 cm, calf 45 to 52 cm
Example XXL target: ankle 30 to 33 cm, calf 50 to 58 cm

These numbers are starting points, not universal rules. Ask for a graded spec sheet before bulk production. It should show flat width at the ankle, calf, top welt, foot length, leg length, and allowed tolerance. For compression socks, a normal tolerance is often plus or minus 0.5 cm on key widths and plus or minus 1 cm on length.

For RFQ review, ask the factory to mark the measuring method on a drawing. State whether widths are measured flat without stretch, with light hand tension, or on a leg form. Do not mix methods between sample and bulk inspection. Also state how many pairs per size will be checked in production. For a small lot, checking 8 to 13 pairs per size gives better control than checking only a mixed carton sample.

There is a commercial trade-off. More sizes improve fit and reduce returns, but they raise MOQ, label count, carton sorting work, and stock risk. A four-size range may be cheaper to buy. A five-size range may sell better if your customers include wide calves.

Plan MOQ, sampling, and bulk timing before launch

MOQ depends on yarn stock, color count, size count, packaging, and pressure testing. At ZheSock in Datang, Zhejiang, many basic maternity compression socks OEM projects can start from 100 pairs when available yarn colors and standard packing are used. This works for a pilot order, a small marketplace test, or a single color with two to four sizes.

Price and factory efficiency improve at higher volume. For repeat orders, many buyers move to 1,000 to 3,000 pairs per color. Custom dyed yarn, printed retail boxes, special insert cards, and many size-color combinations raise MOQ because each material has its own purchasing floor.

Basic sample time: 7 to 12 days after tech pack confirmation
Revision sample time: 3 to 7 days for pressure or fit changes
Pre-production sample time: usually 5 to 10 days after final artwork and size grading approval
Bulk production time for 1,000 to 10,000 pairs: 18 to 30 days after approval and deposit
Extra time for retail box, barcode label, or insert card: 3 to 7 days after artwork approval
Air shipping reference: 5 to 10 days after dispatch
Sea shipping reference: 25 to 40 days, depending on port and season

Do not approve bulk from a photo. Get physical pre-production samples in all planned sizes, or at least the smallest, middle, and largest size. Pressure that passes on M can fail on XL if the grading is too aggressive.

A low-risk sample path has four steps. First, approve yarn color, hand feel, logo size, and general construction. Second, approve fit samples with pressure data. Third, approve the pre-production sample made with final yarn, final packaging, and final label text. Fourth, seal one approved pair per size as the control sample for inspection. Keep those samples in a bag with date, size, yarn blend, machine needle count, and approved pressure result.

Late changes cost money. Changing the top band after sample approval may require new machine settings and pressure checks. Changing a box size after printing can waste cartons and delay shipment. A clear cut-off date for artwork, barcode data, and size ratio should be written into the purchase order.

Use realistic price targets and know the cost drivers

Factory pricing for custom knee-high maternity compression socks often falls between USD 1.20 and USD 3.80 per pair. The low end usually means a plain 15 to 20 mmHg sock, available yarn, simple logo, and polybag packing. The higher end may include 168N knitting, more spandex, jacquard pattern work, retail box, insert card, barcode label, and stricter inspection.

For a 1,000 pair order, a practical target for a private label maternity compression sock is often USD 1.60 to USD 2.60 per pair, subject to final yarn and packaging. A 100 pair pilot order will normally cost more per pair because setup, sampling, and packing labor are spread over fewer units.

Plain polybag packing: often USD 0.03 to USD 0.08 per pair
Printed insert card: often USD 0.04 to USD 0.12 per pair
Retail box: often USD 0.18 to USD 0.45 per pair, depending on size and paper
Barcode or FNSKU label: often USD 0.01 to USD 0.04 per pair
Pressure testing and extra QC time: quoted per order or built into the unit price
Extra size grading work: often reflected in sample fees or a higher unit price
Custom dyed yarn: lower color risk for a brand palette, but higher MOQ and longer lead time

A quote below the normal range may still be possible, but ask what changed. Check yarn content, spandex count, gauge, sock height, packing, inspection level, and whether pressure is tested after boarding. Cheap compression socks often lose pressure after five wash cycles. That becomes a return problem unless the requirement was written into the order.

Set the Incoterm and payment terms early. EXW can look cheaper but leaves local handling and export steps to the buyer or forwarder. FOB is easier for many importers because export handling is included up to the named port. For payment, a common structure is deposit before production and balance before shipment after inspection. If your order includes printed boxes or dyed yarn, the factory may ask for a higher deposit because those materials cannot be reused easily.

Set inspection rules, wash tests, and packing checks in writing

Quality control should begin before yarn is loaded onto the machine. For maternity compression socks OEM, the approved sample, size chart, yarn blend, gauge, pressure target, packing method, defect limits, and carton plan should be part of the purchase order. If the product is sold with medical language, ask your compliance team to review the claim wording and required documents. CE may be relevant in some markets and claim types. For textile safety, OEKO-TEX is commonly requested. ZheSock has OEKO-TEX production options, but documents should still be checked against the actual SKU, color, and material.

A pre-shipment inspection can use AQL 2.5 for major defects and AQL 4.0 for minor defects. For a 1,000 pair lot, inspectors normally pull a random sample based on the agreed inspection standard, then check appearance, size, packing, and function. Compression checks should not be skipped. No guessing.

Incoming yarn check: color lot, yarn count, spandex coverage, moisture condition
In-line knitting check: needle lines, dropped stitches, logo position, leg length
Boarding check: temperature, sock shape, pair matching, top band width
Finished size check: ankle width, calf width, top welt stretch, foot length, total height
Pressure check: ankle and calf points before packing, with records by size
Wash test: at least 5 cycles at 30°C, then recheck size and pressure
Packing check: barcode scan, size sticker, carton mark, pair count, mixed-size control
Carton check: gross weight, net weight, carton size, carton strength, shipping mark
Metal check if required by buyer: record date, machine setting, and rejected piece count

Define major and minor defects in advance. Major defects can include wrong compression range, wrong size label, broken elastic yarn, holes, wrong barcode, missing warning text, mixed sizes in a retail box, and stains larger than the agreed limit. Minor defects can include small loose threads, slight shade variation within an approved range, and small packing wrinkles that do not affect saleability.

Packing needs its own approval. For marketplace shipments, scan every barcode type from final printed labels before mass packing. Check that S, M, L, XL, and XXL labels cannot be confused in the warehouse. If polybags are used, state bag thickness, suffocation warning needs, vent holes if required by the sales channel, and whether the opening uses adhesive tape or a zipper. If retail boxes are used, do a drop check on a packed carton and a rub check on printed surfaces.

One blunt rule helps. If it is not measured, it is not controlled. Put the required numbers in the tech pack and purchase order before bulk knitting starts.

Frequently Asked Questions

What compression level is best for maternity compression socks OEM?

For most retail maternity products, start with 15 to 20 mmHg. It gives daily support and is easier to put on than 20 to 30 mmHg. Firmer compression can be made, but claim wording, user instructions, and market rules need closer review. Test pressure on S, M, and XL at minimum because larger sizes often perform differently.

What MOQ can I use for a private label maternity compression sock?

A basic trial order can start at 100 pairs at ZheSock when the design uses available yarn colors and standard packing. Many factories prefer 500 to 1,000 pairs per color. For better pricing, plan 1,000 to 3,000 pairs per color. Custom dyed yarn, printed boxes, and many size-color combinations will raise the MOQ.

How long does development and production take?

First samples usually take 7 to 12 days after you confirm the size chart, logo, color references, yarn, and compression target. Revisions take 3 to 7 days. Pre-production samples often need another 5 to 10 days after final artwork. Bulk production for 1,000 to 10,000 pairs usually takes 18 to 30 days after sample approval and deposit. Add 3 to 7 days if retail boxes, insert cards, or barcode labels need approval.

Which machine needle count should I choose?

Use 144N for thicker yarn and a warmer sock. Use 156N for many daily support products. Use 168N when you need a finer surface or clearer pattern detail. Confirm the final choice by physical samples and pressure data, not by appearance only.

What should I put in the tech pack?

Include target compression range, size chart, ankle and calf ranges, sock height, yarn blend, machine needle count, GSM target if known, colors, logo placement, packaging, barcode rules, carton packing, AQL level, and approved claim wording. Add wash test requirements, such as 5 cycles at 30°C. Require pressure checks before and after washing. Clear numbers reduce disputes.

Related Searches

maternity compression socks manufacturerprivate label pregnancy compression socks15 20 mmHg maternity socks OEMcustom knee high compression socksmedical compression socks factory ChinaOEM compression socks MOQ