An underwear sample approval should tell a production team exactly what it may reproduce. “Looks good” does not establish whether the waistband, pouch, leg openings, washed dimensions or labels were approved, particularly if the sample contains substitute materials.
Use one controlled record that connects the physical sample, measurement sheet, wear observations and wash results. This guide addresses the approval decision and handover. Choosing the original fit block remains a separate development task.
Name the stage and the decision it can support
| Sample stage | Evidence to review | What remains open |
|---|---|---|
| Development or prototype | Panel arrangement, seam feasibility, layer construction and placement | Any measurements or performance not validated in representative materials |
| Fit and size set | Body chart, graded garment measurements and wear observations | Bulk materials, colour and finishing if different from the tested sample |
| Pre-production | Bulk-intended fabric, elastic, trims, labels and packed configuration | Explicitly listed exceptions only; critical unresolved items stay on hold |
| First production output | Execution against the approved specification and samples | Any deviation requiring correction before continuation |
Stage names vary between suppliers. Agree their meaning rather than relying on the label attached to the parcel. A prototype in substitute jersey can help resolve construction, but it does not establish the fit and wash performance of the final fabric.
Use a cover sheet that prevents sample confusion
Record style, colour, size, sample ID, date, pattern revision, measurement-sheet revision and the material bill. Identify the body fabric, pouch or gusset lining, waistband, leg elastic, thread and labels. Mark every substitution, including a plain band standing in for a branded one.
Attach photographs of the front, back, inside pouch, waistband join and leg finishes. Link photos to the sample ID. Retain matching references with the buyer and supplier, and state which document controls if an old sample differs from an approved correction.
Build the measurement sheet around underwear behaviour
| Point or check | Method field to complete | Result fields |
|---|---|---|
| Waist | Relaxed half-width or circumference; band included; conditioning | Target, tolerance, actual, disposition |
| Extended waist | Applied force or extension condition and rest time | Actual result and reference method |
| Front and back rise | Start/end points and whether the waistband is included | Values by size before and after care |
| Leg opening and inseam | Flat measurement path and finish reference | Left/right values and any asymmetry |
| Pouch/gusset | Marked points, seam paths, layers and orientation | Dimensions plus fit observations |
| Seam extension | Location, direction and agreed extension condition | Opening, stitch damage or recovery observation |
Keep garment measurements separate from the customer body-size chart. Include the base size and range ends, plus sizes around any grade change. A single correct sample cannot validate the whole grade.
Record wear and washing as separate evidence
For wear, state the relevant movements and observations: waistband migration, pouch position, leg ride-up, seam contact and pressure. Use participants appropriate to the sizes being evaluated. Translate feedback into a location and sample revision rather than a general comfort score alone.
For washing, record procedure, cycles, drying, conditioning and the materials tested. Measure consistently before and after. Note dimensional change, twist, recovery, seam integrity, colour transfer and label legibility separately. A fabric report cannot answer every finished-garment question, and a fresh sample cannot demonstrate durable performance after repeated care.
A worked approval comment
Hypothetical record, not a recommended tolerance: “Sample FIT-03, size M, front rise target 24.0 cm, permitted variation ±0.5 cm, actual 23.2 cm using method FR-01. Result: outside the agreed range. Pattern revision required. Submit a corrected sample and reassess the related pouch and waistband position. Bulk cutting is not released.”
The useful parts are the sample identity, measurement method, requirement, observation, action and release status. The example values must be replaced by values justified for the actual product and manufacturing capability. Do not write an adjustment only in email while leaving the technical specification unchanged.
Give every item a clear disposition
- Approved: the identified feature meets the recorded requirement.
- Approved with a defined exception: name the exception, its limits and the action permitted. Do not use this to bypass an unresolved essential fit or safety issue.
- Resubmit: list the correction and the evidence required before approval.
- Hold: identify the activity that may not proceed and the person who can release it.
Summarise whether material ordering, trim printing, cutting, assembly and packing are released. These are different actions. A brand may approve a label layout while the composition remains unconfirmed, but that does not authorise printing the final label.
Hand the same evidence to inspection
The inspector needs the current measurement sheet, approved sample references, defect definitions, inspection plan and unresolved-item status. Identify the sampling standard and edition if a formal plan is used. Confirm how washed or destructive-test samples are selected and separated from saleable stock.
For general record controls, use the sealed-sample record guide. The underwear fit-block guide addresses development choices, while the wholesale sample protocol explains the broader order handover.
