Quick answer
A compression sock inspection should compare finished goods with the approved specification and sample. Check identity, measurements, construction, appearance, elasticity, fit-related features, pair matching, labeling, pack count, and carton information, while handling pressure verification under an agreed test plan.
Quality control begins before production. If the purchase order does not define the approved sample, dimensions, acceptable variation, packaging version, and inspection method, the final inspection has no clear benchmark.
Build the inspection file first
- Final purchase order and size-color breakdown.
- Approved product specification and measurement method.
- Sealed or clearly identified approval sample.
- Approved packaging artwork and barcode list.
- Agreed inspection level, defect rules, and test requirements.
Product identity and appearance
| Check | What to review | Common risk |
|---|---|---|
| Style and color | Correct design, yarn colors, logo, and size | Mixed versions or incorrect assortment |
| Knitting | Dropped stitches, holes, loose yarn, and pattern alignment | Visible defects or reduced durability |
| Pair matching | Length, shade, logo position, and shape | Mismatched left and right socks |
| Finishing | Cleanliness, loose threads, stains, and odor | Poor retail presentation |
Measurements and size consistency
Use the same laying method, measurement points, and fabric condition stated in the specification. Review foot length, leg length, cuff width, ankle and calf-related dimensions, and other construction-specific points. Record results by size rather than averaging the full order.
Cuff, heel, toe, and seams
Inspect cuff recovery, heel placement, toe closure, seam comfort, reinforcement, and logo attachment. Zipper styles need additional checks for slider operation, guards, alignment, and secure attachment. Open-toe styles need clean edge finishing and consistent opening dimensions.
Pressure and performance verification
A visual inspection cannot confirm a labeled mmHg range. Pressure-related verification needs an agreed method, sample condition, size, measuring locations, and acceptance criteria. Buyers should keep reports connected to the approved construction and control changes that could affect performance.
Additional program-specific checks may include wash performance, dimensional change, colorfastness, pilling, abrasion, stretch recovery, and material verification. Select tests based on claims, channel, risk, and target-market requirements.
Packaging and labeling inspection
- Correct size band, box, pouch, or insert for each pair.
- Readable barcode and correct SKU assignment.
- Approved fiber content, care, origin, and seller information.
- Correct pack count, color assortment, and carton quantity.
- Legible print, secure labels, and undamaged retail packaging.
Use defects to improve the process
Classify repeated issues by cause: material, knitting, finishing, handling, packaging, or document control. Correcting only the visible defect may allow the same problem to return. A short corrective-action record helps support future reorders.
Buyer takeaway
A useful QC checklist is specific to one approved product. It combines visual inspection with measurements, construction checks, packaging control, and any required performance tests. The clearer the pre-production standard, the more objective the shipment decision becomes.
Frequently asked questions
Can visual inspection confirm compression pressure?
No. Appearance alone cannot confirm a labeled mmHg range. Pressure verification needs an agreed test method, sample condition, locations, and acceptance criteria.
What should be checked on every compression sock style?
Confirm product identity, dimensions, knitting, pair matching, cuff, heel, toe, seams, cleanliness, labels, packaging, assortment, and quantity.
Why keep an approved sample?
The approved sample gives the buyer and inspector a physical reference for appearance, construction, hand feel, logo placement, and packaging expectations.