Sportswear sample approval checklist: ready for bulk?

What does “approved for bulk” actually mean?

It means one physical sample and one set of documents have been accepted as the reference that production must match. Cutting, sewing, decoration, packing and final inspection are all judged against them, so treat approval as a commitment both sides will be held to, not as a compliment.

Sportswear passes through several sample stages, and each proves something different. Approving the wrong stage is how buyers end up signing off a garment that has never been made in its real fabric. A standard style with only a logo added may need just one decorated sample in stock fabric; a new pattern normally needs fit, size-set and pre-production checks.

Which fit and movement checks should the sample pass?

Measure first, then move. Lay the sample flat, measure every point on the spec sheet using the method written there, and record each deviation from target. Then fit it on a person whose body matches the base size, because a garment inside tolerance can still ride up, gape or restrict movement.

Anything outside the tolerance on your spec sheet becomes a numbered comment, not a matter of opinion. On the body, run the movements the garment will actually see:

• Overhead reach: hem lift, underarm pull, sleeves riding up the forearm.
• Deep squat: waistband rolling or dropping at the back, see-through fabric at the seat, crotch-seam strain.
• Lunge and high knee: shorts legs riding up, liner bunching, inner-thigh rubbing.
• Running arm swing: chafing at underarm and side seams, neckline gaping, a logo dragging the fabric.
• Bend and twist: back-hem exposure, side seams twisting, pocket contents bouncing.

How should fabric and colour be approved?

Ask in writing whether the sample was cut from bulk fabric, from the same quality in a different dye lot, or from a substitute. A substitute can approve fit and construction but not hand-feel, colour, stretch, opacity or shrinkage. If the answer is substitute, record that fabric approval remains open and name the swatch or pre-production sample that will close it.

Check weight against the quoted g/m² (ASTM D3776 covers how fabric mass per unit area is measured) and confirm that the composition on the fabric specification matches the declaration planned for the label. Judge colour against the approved lab dip or physical standard in a light booth, never on a screen. Many buyers use D65 daylight as the main source and confirm under a second, store-type source to catch metamerism: fabrics that match in daylight but not under shop lighting.

What should the wash check cover before sign-off?

Wash an identical duplicate, not the sample you will keep as the reference. Follow the care instructions you intend to print, use a recognised household procedure such as those in ISO 6330, and measure the same points before and after, as ISO 5077 does for dimensional change. One or two cycles is a screening check, not a laboratory result; if a retailer or a product claim needs evidence, commission accredited tests on bulk fabric or garments.

In the US, the FTC’s Care Labeling Rule requires a reasonable basis for care instructions, and its guidance says the evidence must cover the entire garment. Prints, transfers and trims therefore have to survive the same care as the fabric. After washing, check:

• Dimensions: the same points re-measured and compared with the limit you agreed.
• Twist: side seams migrating towards the front of a tee or a shorts leg.
• Decoration: cracking, lifted edges, or dye bleeding into a light print.
• Colour: shade loss, or staining of white binding, piping and contrast panels.
• Surface: pilling, puckered seams, or waistband elastic that no longer recovers.

Which artwork, label and packing details get missed?

These details rarely change how the garment performs, yet they are a common source of late re-work when nobody approved them on a physical piece. Label wording is a typical case: fibre names follow the destination’s rules, Regulation (EU) No 1007/2011 in the EU and the FTC’s Textile Act rules in the US, so approve the text for each market before labels are printed.

Check each item in the table against its own reference, and record that reference in the approval.

How do you write an approval that holds up in bulk?

Use one of three outcomes: approved, approved with comments, or rejected. “Approved with comments” works only when each comment is numbered, measurable and states whether the factory must send another sample or may correct directly in bulk. “Looks good, maybe a bit tighter” is not an instruction.

Then seal the sample. Attach a signed, dated tag naming style, stage, size and colour, and keep two identical approved pieces: one with you, one at the factory. SGS describes final random inspection as checking goods against the reference sample, confirmed specification, purchase order and packing instructions, so the inspector needs a reference both sides can identify. The approval message should state:

• Style number, sample stage, size, colour and date received.
• The spec sheet, artwork and label versions used for judging.
• Measurements taken, with every out-of-tolerance point listed.
• Numbered corrections, each with a target value and who confirms it.
• Open items that must close before cutting, such as bulk-fabric shade.

How SenLin handles sample approval

SenLin prepares standard samples in 3–4 days and custom samples in 3–7 days, and publishes a garment tolerance of 1–2 cm for its performance tees, long sleeves, shorts, pants and sets. Production, 15 working days for standard styles and 20–25 for custom development, starts only after the order, material, artwork and sample are confirmed, so closing comments quickly protects the delivery date. The costed bill of materials sent with the quotation doubles as a trim list to check the sample against, and Pantone lab dips and a bulk inspection record are available. Tests and inspection scope are agreed for each order.