Proto vs. Fit vs. PP vs. TOP Samples

Sample stages are the sequential checkpoints in garment development where brands evaluate and approve prototypes before committing to bulk production. Each stage. from proto through TOP. serves a distinct purpose in catching design flaws, fit issues, and construction errors before they become 10,000 unit problems.

What Each Sample Stage Means

Proto samples (prototype or development samples) are the first physical interpretation of your tech pack. Factories typically cut these in a single size using available fabric. not your actual production material. Expect color and hand feel to differ from final goods.

Fit samples refine the pattern based on proto feedback. These get tested on fit models or dress forms to nail measurements, ease, and movement. Most brands need two to four fit sample rounds.

PP samples (pre-production samples) use actual production fabric, trims, and construction methods. This is your last chance to catch issues before cutting begins.

TOP samples (top of production) are pulled from the actual production run, usually within the first 500 units. They confirm the factory maintained PP sample standards at scale.

What's Inside Each Sample Type

Proto samples include basic construction with substitute materials. Factories use whatever 60 GSM jersey they have on the shelf if you specified 58 GSM organic cotton. Labels are often handwritten or omitted entirely.

Fit samples add accurate measurements to the base pattern but may still use substitute fabric. Expect to receive one to three units in your base size.

PP samples contain everything: your contracted fabric, correct colorway, branded labels, care tags, and final packaging. Factories in Bangladesh or Vietnam typically ship two to five units across the size range.

TOP samples match PP exactly. Any deviation signals a production control problem that needs immediate attention.

Why Sample Stages Matter for Unit Economics

Skipping or rushing sample stages costs more than the $150 to $400 per round you're trying to save. A fit issue discovered at TOP stage on a 15,000 unit order means either shipping defective goods, reworking at $0.80 to $1.50 per unit, or eating the loss entirely.

Brands that compress proto and fit into one round often face three to four additional fit sample iterations anyway. The factory builds these delays into their calendar, pushing your delivery date.

Proper staging also protects your AQL inspection outcomes. When PP samples are thoroughly approved, inspectors have a clear reference standard. Ambiguous approvals lead to disputed inspection results and finger pointing about what was actually agreed upon.

Common Mistakes Brands Make

Approving fit samples without live model testing. Flat measurements can hit spec while the garment fits poorly in motion. Budget for fit models, especially on technical or fitted styles.

Treating PP approval as a formality. If the PP sample has a minor construction shortcut. like single needle where double was specified. assume that shortcut will appear in every bulk unit.

Not retaining sealed samples. Keep one PP sample sealed in plastic with dated approval signatures. This becomes your legal reference if TOP or bulk goods deviate. Factories in China and Southeast Asia expect this practice.

Accepting verbal confirmations. Every approval should be written. email minimum. with photos attached. Courts and arbitrators want documentation.

How Sample Stages Show Up in an Ohzehn Deal

When you submit a tech pack through Ohzehn's 72 hour quote process, factory bids include line items for each sample stage. You'll see proto pricing (typically $80 to $250 depending on complexity), fit sample costs, and PP sample fees broken out separately from bulk unit pricing.

Ohzehn's vetted factory network follows standardized sample timelines: 10 to 14 days for proto, 7 to 10 days per fit round, and 10 to 14 days for PP samples after fabric arrives. These timelines assume you've provided complete tech packs. Incomplete specs add five to seven days minimum.

Factories submit sample photos through the platform before shipping, letting you catch obvious issues without waiting for international transit.

When to Compress or Expand the Process

Compress sample stages when: You're reordering a proven style with zero changes, or developing a basic commodity item (blank tees, standard fleece) where the factory has extensive relevant experience.

Expand sample stages when: You're launching a new category, working with technical fabrics, or the style has complex construction like lined blazers or multi-panel athletic wear. Add a size set sample between fit and PP to validate grading across the full size range.

Compression works for 20% of production. The other 80% needs full staging. Brands that default to compression because of timeline pressure usually pay in quality failures, customer returns, and damaged retail relationships.

Connecting Samples to Compliance and Certification

If your product requires certification. like Recycled Claim Standard for recycled polyester. verify certification at PP stage, not after bulk is cut. Request transaction certificates (TCs) matching your PP sample fabric lot.

Social compliance audits like BSCI or WRAP certify the factory, not the product. But factories under audit pressure sometimes subcontract sample making to uncertified facilities. Confirm where each sample stage is actually produced, especially if your brand makes public claims about ethical manufacturing.

Documentation That Protects You

Maintain a sample approval log with these fields: date received, date approved or rejected, specific comments, approver name, and photo links. Store this alongside your purchase orders and letter of credit documentation if you're using trade finance.

Request that factories include sample stage labels inside each sample garment (a small sewn tag reading "FIT SAMPLE" or "PP SAMPLE"). This prevents confusion when you're comparing multiple rounds months later during a quality dispute.

Ship one sealed PP sample to your inspection partner before bulk begins. Third party inspectors charge $30 to $50 to store a reference sample, and it's the cheapest insurance you'll buy in this business.