Manufacturing Guide

Sock Purchase Order Spec Sheet: Data Factory Needs

Published: 2026-07-02By ZheSock TeamReading time: 5 min

A sock purchase order spec sheet is the document that stops a factory from guessing. Most sock claims start with missing data, not bad intent. If the sheet says only "men's cotton crew, black, logo on side," the mill still still has to choose machine count, yarn count, toe closure, logo size, label method, and carton loading. Those choices change fit, cost, and lead time. A usable sock purchase order spec sheet gives the mill enough data to quote, sample, buy yarn, knit, inspect, pack, and ship without filling in blanks on its own.

Table of Contents

1. What a sock purchase order spec sheet must include
2. Size, gauge, and needle count. This is where fit errors start
3. Material data the factory needs before it can quote correctly
4. Artwork, logo method, and color control
5. Packing and carton data that factories need before bulk starts
6. Use the spec sheet to control lead time, QC, and claims

What a sock purchase order spec sheet must include

Put commercial data and production data in one file. For most custom styles, one page is not enough.

PO number, style number, buyer name, revision date
Product type, such as no-show, ankle, quarter, crew, knee-high, or over-the-calf
Target size range in actual units, such as EU 39 to 42, US men 7 to 9, foot length 24 to 26 cm
Base sample size used for approval
Machine gauge or needle count, such as 144N, 156N, 168N, 200N
Knit structure, such as single jersey, full terry, half terry, rib, mesh, or pique
Yarn composition by percentage, and by zone if different
Yarn count where relevant, for example 21S cotton or 32S combed cotton
Color reference for each area, including body, cuff, heel, toe, and logo
Logo method and exact placement in cm from cuff edge or heel center
Toe closure method if required
Wash standard and measurement tolerance
Packing method, barcode type, carton quantity, carton size, and weight limit
Incoterm, ex-factory date, destination, claim standard, and AQL level

If 3 or 4 fields are missing, the sample often stalls. That usually adds 2 to 5 working days because the merchandiser has to stop and clear open points. If yarn shades need buyer approval, add another 3 to 7 days.

MOQ depends on style complexity. A simple jacquard crew with stock yarn colors may start at 300 pairs per color. A style with custom-dyed yarn, size stickers, belly band, and retailer carton marks is more often 1,000 to 1,200 pairs per color. For trial orders, some factories accept 100 pairs on selected constructions. Cost per pair will be higher. Color options will be limited.

Size, gauge, and needle count. This is where fit errors start

Words like men's, women's, and kids are not enough. Put actual dimensions on the sock purchase order spec sheet. The factory needs relaxed foot length, leg length from heel to cuff, cuff width, and extension target if stretch matters. State whether measurements are before wash or after wash.

Adult crew example, foot 24 cm, leg 22 cm, cuff width 8.5 cm relaxed
After-wash tolerance, foot and leg plus or minus 1.0 cm, cuff width plus or minus 0.5 cm
Pair weight tolerance, plus or minus 3 percent for regular cotton styles

Needle count should be exact. It affects fit, appearance, and price.

96N to 108N for basic kids socks and low-detail casual styles
144N to 168N for common adult casual and sports crew socks
200N for finer dress socks, cleaner jacquard edges, and lighter pair weight

Example. A men's crew in 168N with half terry sole and arch support will not fit or cost the same as a 200N dress sock in flat knit. The first may weigh 58 to 72 g per pair. The second may weigh 38 to 50 g per pair, depending on size and yarn. If you approve a sample on 156N and place bulk on 168N without updating the spec sheet, logo scale and foot feel will change.

Also specify toe shape. Standard linked toe and hand-linked toe do not carry the same cost. For mass casual programs, linked toe is common. For finer dress socks, buyers often ask for a flatter seam line.

Material data the factory needs before it can quote correctly

"Cotton sock" is not a material spec. Put the fiber split in percentages that total 100. If zones differ, list each zone.

Example of a workable body spec, 78 percent combed cotton, 19 percent polyester, 3 percent elastane. Example of a terry sport sock, body 65 percent cotton, 20 percent polyester, 12 percent nylon, 3 percent elastane, sole full terry. If you need recycled content, state the required percentage and whether GRS documents are required. If you need organic cotton, state GOTS. If your market asks for skin safety documentation, note OEKO-TEX.

Yarn count matters too. 21S cotton and 32S combed cotton do not give the same hand feel or cover. For finer dress socks on 200N, buyers often use finer counts than for 144N to 168N casual styles.

Basic adult cotton crew, 144N to 168N, simple jacquard, FOB about USD 0.45 to 0.90 per pair at 3,000 to 10,000 pairs
Full terry athletic crew with arch band and multiple color areas, FOB about USD 0.85 to 1.30 per pair
Merino blend or higher compression constructions, often USD 1.20 and up, depending on yarn cost and machine time

Do not ask the factory to match a previous order unless you attach the last approved spec. Yarn lots change. Cotton shade variation happens. Custom dyeing can add 5 to 10 days before knitting starts. If color is critical, ask for lab dips or yarn shade cards before sample knitting.

Artwork, logo method, and color control

Artwork needs production rules, not just a PDF. State whether the logo is jacquard knit, embroidery, transfer print, silicone grip, woven label, or print on the header card only. Each method has limits.

For jacquard logos, put exact width and height in mm and exact position. Example, side logo 32 mm wide by 18 mm high, centered 6 cm above heel line on outer leg. "Logo on side" is not a spec. On a 168N sock, tiny letters and thin outlines may fill in. On 200N, the same artwork may read better, but cost rises.

Color control should be area by area.

Body, Pantone Black C
Cuff stripe 1, Pantone 186 C
Heel and toe, Pantone Cool Gray 9 C
Logo, Pantone White

If marl, heather, or space-dye effects are wanted, say so directly. They are not the same as solid shade matching. Also state the maximum number of yarn colors in one design. More colors can slow knitting speed and raise waste. On many custom programs, adding several color feeds changes cost by USD 0.05 to 0.20 per pair.

Attach vector artwork, a mockup, and one photo of the expected on-leg look. Then state which file controls if they conflict. In most cases, the written spec should control dimensions, and the approved physical sample should control final appearance.

Packing and carton data that factories need before bulk starts

Late packing changes are expensive because they hit after knitting and boarding. Put all retail and carton details on the spec sheet before bulk approval.

Pair packing, such as one pair with belly band, one pair with header card and plastic hook, or multipack
Barcode type, such as EAN, UPC, or FNSKU if required
Barcode placement, on band, on polybag, or on carton only
Polybag size and warning text if polybags are used
Inner pack quantity, for example 12 pairs or 24 pairs
Export carton quantity, for example 120 pairs, 180 pairs, or 240 pairs
Carton size limit, for example 60 x 40 x 35 cm maximum
Gross weight limit, commonly 12 to 15 kg per carton
Carton marks, style, color, size, PO, country of origin, carton number

Typical carton loading for adult crew socks is 120 to 240 pairs per carton. Thick full terry sports socks often need lower loading because volume rises fast. If the buyer wants Amazon prep, retailer labels, or pallet height limits, put that on page one. Do not leave it for a shipping email.

One wrong barcode can create relabeling cost at destination. One wrong carton mark can hold a warehouse intake appointment. These details matter. They are a common reason for chargebacks.

Use the spec sheet to control lead time, QC, and claims

A good sock purchase order spec sheet is also a control document for timing and inspection. Add milestones. Add acceptance rules.

Sample lead time, 5 to 10 days for standard styles after all data is clear
Counter sample or revised sample, another 5 to 7 days
Bulk lead time, 25 to 35 days after final sample approval for standard programs
Peak season or custom-dyed yarn, often 35 to 45 days

Put your inspection level in writing. A common final inspection standard is AQL 2.5 for major defects and 4.0 for minor defects. If you use a stricter standard, say it before quote. The factory may need more in-line checking and extra sorting labor.

Useful QC points for socks include:

Incoming yarn check against approved composition and color reference
First-off knitting check for size, logo clarity, and structure
Boarding check after washing or steaming for final measurement
Metal detection if required by the buyer program
Final random inspection by carton count, packing accuracy, and barcode scan

Ask the factory to record at least these bulk measurements, foot length, leg length, cuff width, and pair weight. For a 3,000-pair order, many buyers ask for in-line checks every 500 to 1,000 pairs per style and color. For final inspection, sample size depends on inspection level and total quantity. The acceptance criteria should be written on the PO sheet before goods are packed.

Most claims come from five failures. Wrong size. Wrong color. Wrong logo position. Wrong fiber split. Wrong packing. A clear spec sheet and one approved pre-production sample used as the bulk standard can prevent most of them.

Frequently Asked Questions

What is the difference between a sock purchase order spec sheet and a tech pack?

A tech pack explains the product design. A sock purchase order spec sheet tells the factory how to make, pack, inspect, and ship that order. It should state needle count, measurements with tolerance, approved composition, logo position, packing details, carton loading, AQL standard, MOQ by color, and ex-factory date. Most importers use both.

What MOQ should I expect for custom socks?

For regular custom socks, 300 to 1,200 pairs per color is common. Simple styles with stock yarn colors are usually at the low end. Custom-dyed yarn, many color feeds, and custom retail packing push MOQ up. Some factories accept 100-pair trial orders on selected styles, but the price per pair is higher and construction options are fewer.

How many sample rounds are normal before bulk production?

One to three rounds is normal. Round one checks size, structure, and logo clarity. Round two checks corrections and often color. A third round usually happens when the buyer changes yarn, artwork, or packing after the first review. Each round usually adds 5 to 10 days.

Should compliance requirements be written on the spec sheet?

Yes. Put them in writing before bulk starts. If your order needs OEKO-TEX, GOTS, GRS, BSCI, Sedex, ISO 9001, or CE for a relevant accessory or market requirement, list that on the sheet and ask for document confirmation before production. Do not assume the previous order used the same certified material source.

What are the most common causes of sock production claims?

The most common causes are size out of tolerance, color mismatch, logo placement error, composition mismatch, and packing mistakes. In many cases, the root problem is missing data on the sock purchase order spec sheet. If the sheet does not state exact measurements, Pantone references, needle count, fiber percentages, barcode format, or carton loading, the factory will make those choices itself.

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