"Pre-Production Sample Checklist for Fashion Brands: Approve Before Bulk"

The pre-production sample—often called a PP sample—is the final physical reference a factory uses before bulk cutting begins. It should represent the approved fabric, colour, trims, fit, construction, labels and packaging direction. If it is not reviewed carefully, the same issue can be repeated hundreds or thousands of times in bulk production.

Use this pre-production sample checklist to make the approval decision deliberate, documented and easy for the factory to follow.

What is a pre-production sample?

A pre-production sample is a garment made after development and fit decisions are complete, using the intended bulk materials and final production methods wherever possible. It is different from an early proto sample, which is mainly used to test the design and silhouette.

The PP sample answers one question: if bulk production matches this sample, is the brand ready to accept it?

If the answer is no, document the correction before bulk cutting starts.

Review the approved tech pack version first

Do not review a PP sample from memory. Open the current tech pack version and make sure the sample is being compared against the same approved document the factory received.

Confirm:

• Style number, colourway and season
• Tech pack version and revision date
• Sample stage and sample date
• Factory name and sample-room contact
• Size being reviewed
• Any approved exceptions from earlier samples

If the factory is working from an old version, pause the approval. A visually good sample can still be wrong if it reflects outdated measurements, trims or artwork.

Pre-production sample checklist

1. Fabric and colour

• Does the main fabric match the approved quality, composition, weight and hand feel?
• Does the colour match the approved lab dip, Pantone reference or signed swatch?
• Are lining, rib, pocketing and contrast fabrics correct?
• Is there shade variation between panels, components or dye lots?
• Has the garment been washed or finished as it will be in bulk?

2. Fit and measurements

• Is the sample the correct size?
• Are all key points of measure within the approved tolerances?
• Does the garment fit the intended fit model or mannequin?
• Are sleeve, body, rise, inseam and opening proportions correct?
• Are stretch and recovery acceptable where relevant?

Record actual measurements beside the approved spec. A sample that is within tolerance may pass numerically but still require a fit comment; document both facts.

3. Construction and workmanship

• Are seam types, seam allowances and topstitch widths correct?
• Are pocket placement, collar shape, plackets and hems consistent with the technical flat?
• Are bartacks, reinforcement points and stitch density correct?
• Are loose threads, skipped stitches, puckering or uneven seams present?
• Does the inside finish meet the brand’s quality standard?

Take photos of details that need a correction. Number the comments so the factory can map each one to a specific location.

4. Trims, labels and branding

• Are buttons, zippers, snaps and drawcords the approved types and colours?
• Do label artwork, size labels and care-label content match approved files?
• Is logo or artwork placement correct in position, scale and colour?
• Are hangtag, polybag and barcode instructions included where applicable?

Small trim substitutions can change quality perception quickly. Compare every visible component to the BOM rather than assuming it is correct.

5. Packaging and production readiness

• Is folding method correct?
• Is polybag size and warning text correct for the destination market?
• Are carton ratios, carton markings and packing instructions defined?
• Has the factory confirmed material availability and bulk lead time?
• Are unresolved issues written as hold points rather than verbal notes?

Choose an approval status clearly

Use a simple, explicit outcome so the factory knows whether it can proceed.

Avoid using only “looks good” in an email. Approval should name the style, colourway, size, version and status.

Write comments that the factory can act on

Good sample comments include the observed result, the tech pack reference and the required action.

Comment 4: Left chest pocket is 1.5 cm too low. Tech pack v2.0, flat sketch callout C shows the pocket top edge 8 cm below shoulder seam. Raise pocket 1.5 cm for PP recheck and bulk.

This is more useful than “pocket looks low,” because it gives the sample room an exact target and a source reference.

Keep the approval record with the tech pack

The final PP sample approval should be stored with the tech pack, BOM, measurement spec and sample comments. It becomes the reference for production, quality control and any later factory conversation.

ThreadPack helps keep those documents and revisions connected to the same style, so the latest approved instruction is easier to find than a scattered email thread.

Use this checklist alongside how to communicate with garment factories using a tech pack and the complete tech pack guide.
FAQ

Can a factory start bulk production before PP sample approval?

It should not start bulk cutting without a documented approval or an explicitly agreed commercial exception. Changes after cutting are significantly more expensive.

Is a PP sample always made in bulk fabric?

It should be whenever possible. If final bulk fabric is unavailable, clearly record what differs and what must be reconfirmed before production.

Who should approve a PP sample?

The person responsible for technical product decisions should approve it, with input from design, production and quality where needed. The approval should be recorded in writing.