A development sample and a pre-production (PP) sample do two different jobs. The development sample confirms the design, silhouette, and fit direction; a sweater PP sample confirms the exact production specification that bulk will follow. Approving the right things at each stage keeps resampling costs down and prevents delays between sampling and delivery.
What a Development Sample Confirms
A development sample is the first physical version of a new style, made in a single size from the intended yarn and stitch structure. This lets the buyer judge the silhouette, proportions, yarn hand, and construction approach before committing to production.
At this stage the goal is design direction, not final specification. A development sample may use a close-match yarn if the exact fiber or color is not yet sourced, and it may not carry final trims, labels, or packaging. What matters is whether the shape, drape, neckline, cuff and hem treatment, and pattern placement match the design intent. It is the first step in a longer sequence; for the full workflow, see our guide to the custom sweater sampling process.
The development sample answers questions such as:
- Does the silhouette and proportion match the design?
- How does the yarn feel, weigh, and drape?
- Do the neckline, collar, cuff, and hem sit correctly?
- Are the stitch and pattern placement right?
- Does the construction approach (fully fashioned or cut-and-sew, linking, seaming) work for the design?
What a PP Sample Confirms
A pre-production (PP) sample is made the same way bulk production will be: final yarn, final gauge, final colors, final trims, and the same machinery and settings used for the main order. It is the last approval gate before the factory begins knitting and linking the full order.
The PP sample confirms production feasibility rather than design. The buyer checks exact measurements against the tech pack, the washed and finished appearance, color against the approved shade, and workmanship under production conditions. This is the same set of checks summarized in our sample approval checklist. Once approved, this sample becomes the reference — sometimes called the sealed or approved sample — that the bulk order is measured against.
Development Sample vs PP Sample at a Glance
| Stage | Development Sample | PP Sample |
|---|---|---|
| Purpose | Confirm design, silhouette, and fit direction | Confirm the exact production specification |
| Yarn and color | Close-match yarn; color direction only | Final yarn and final approved color |
| Gauge and stitch | Intended gauge to judge hand and drape | Production gauge and settings |
| Trims and labels | May be omitted or substituted | Final trims, labels, and packaging |
| Measurements | Approximate, in one size | Checked against the tech pack, within tolerance |
| Result of approval | Design sign-off | Production sign-off (reference sample) |
What to Approve at the Development Sample Stage
Approval at this stage is about design and fit, not final numbers. Work through the following before you move on:
- Silhouette and overall proportion against your reference
- Fit direction — how the garment sits on the body or form
- Yarn hand, weight, and drape
- Neckline, collar, cuff, and hem shape
- Stitch and pattern placement, including cables, jacquard, intarsia, and stripes
- Construction method — fully fashioned or cut-and-sew, linking, and seaming
At this stage, avoid locking measurements or exact colors that may still change. Recording feedback as specific comments — rather than general notes such as “make it better” — helps the factory interpret the changes accurately.
What to Approve at the PP Sample Stage
The PP sample is where the specification gets locked. Check the following against your tech pack and approved references:
- Measurements against the tech pack, within the agreed tolerance
- Final color against the approved shade or shade band
- Washed and finished appearance, including shrinkage and dimensional change against the agreed requirement
- Final trims: buttons, zippers, labels, care labels, and hang tags
- Logo or branding method, whether embroidery, jacquard, print, or patch
- Workmanship: seams, linking, finishing, and loose threads
- Packaging specification
Approving the PP sample locks the specification. Anything changed after this sign-off can require a new sample and can move the delivery date.
What Happens When You Change Something After Each Stage
Changes made at the development sample stage are part of normal iteration and cost less to absorb, because the specification is still open. The same change requested after the PP sample is approved is different: it can mean re-sourcing yarn, re-running a dye lot, or re-knitting panels, and it can delay bulk.
Mistakes to avoid at each stage:
- Skipping the PP sample to save time
- Approving design details only at the PP stage
- Changing yarn or color after the PP sample is signed off
- Treating a development sample as the final reference for bulk
In our 20+ years of knitwear manufacturing, we structure sampling so the design is confirmed before the production specification is locked. For more on why a sample can look different from the finished order, see why sweater samples differ from bulk production.
Frequently Asked Questions
Is a development sample the same as a PP sample?
No. A development sample confirms design and fit direction using close-match yarn and a single size. A PP sample confirms the exact production specification — final yarn, colors, trims, and measurements — and becomes the reference for bulk.
Can I skip the PP sample to save time?
Skipping the PP sample moves unverified details into bulk production, where corrections are more expensive. A PP sample is the last chance to confirm measurements, color, and workmanship before the full order is produced.
How many development sample rounds are needed before a PP sample?
The number depends on the design and how specific the feedback is. A simple style with clear references may need fewer rounds; a complex pattern or a new yarn may need more. Each round should move the sample closer to the final specification.
What should I send so the development sample matches my design?
A clear reference image or design drawing, a tech pack with measurements, and your material and color preference. The more specific the reference, the fewer interpretation gaps.
Can I change colors after the PP sample is approved?
Yes, but it may require a new dye lot and a new color approval, which can delay the order. It costs less to confirm color during the development sample stage.
Does the PP sample need to be made in every size?
No. The PP sample is made in one reference size to confirm the specification, while grading is confirmed separately against the agreed size chart. If a style has a fit point that only appears at larger sizes, discuss with the factory whether an additional size sample is warranted.
Confirm Your Sample Stages Before You Commit to Production
When you send an inquiry, include your reference image or design drawing, tech pack, material preference, target quantity, colors, size range, logo or technique requirements, packaging requirements, and target delivery date. Contact our sampling team to confirm which sample stages your design needs and what to approve at each.
