A tech pack is how your idea becomes a manufacturable product. The clearer it is, the faster and more accurately your factory can sample and produce — and the fewer expensive revision rounds you’ll go through. Here’s how to prepare one, even if you’re not a designer.
Key takeaways
- A tech pack = the specification your factory builds from.
- Include measurements, materials, colors (Pantone), hardware, lenses, logo, packaging.
- Supply your design as a labeled sketch, CAD drawing, or reference sample — all work.
- Know the 5 key measurements: lens width, bridge, temple length, lens height, total width.
- A clear tech pack = faster samples, fewer revisions, lower cost.
What is an eyewear tech pack?
A tech pack (technical package) is the document that tells the factory exactly what to make. It removes guesswork: instead of describing a frame in words, you specify it in measurements, materials and references. For OEM production it’s essential; for ODM (customizing an existing design) a lighter version works. See OEM vs ODM vs private label for the difference.
What to include in an eyewear tech pack
| Section | What to specify |
|---|---|
| Measurements | Lens width, bridge, temple length, lens height, total width |
| Materials | Acetate, TR90, metal, titanium (and grade) |
| Colors | Pantone (PMS) codes; front, temple, tips |
| Hardware | Hinge type (standard/spring/7-barrel), screws, metal core wire |
| Lenses | Type, tint, coating, UV, power (if applicable) |
| Logo | Placement, method (laser/print/plaque), size |
| Packaging | Case, cloth, box, tags |
You don’t need every field perfect — lock down measurements, materials and colors, and let the factory advise on the technical details.
How to supply your design
Three equally valid options, easiest last:
- Labeled sketch — a hand drawing with dimensions and notes.
- CAD / 2D drawing — precise vector or technical drawing.
- Reference sample — a physical frame closest to what you want, with the changes marked. Often the fastest route to an accurate sample.
A capable factory can develop tooling from any of these.
Key measurements explained
Eyewear sizing is usually written as three numbers on the temple — e.g. 52-18-140:
- Lens width (52) — horizontal width of one lens, in mm
- Bridge (18) — distance between the lenses
- Temple length (140) — length of the arm
Plus two more in a full spec:
- Lens height — vertical lens dimension (affects shape and coverage)
- Total frame width — outer edge to outer edge
These five drive fit and consistency. For category-typical ranges, see our optical frames spec table.
Common mistakes to avoid
- Vague colors — always give Pantone codes, not “dark blue.”
- No measurements — “medium size” isn’t producible; give millimeters.
- Ignoring hardware — hinge type changes fit, feel and cost.
- Forgetting lens specs — UV, tint and coating must be stated.
- Over-specifying things you’re unsure about — state intent and let the factory advise.
From tech pack to sample
Once your tech pack is ready, the factory quotes, then produces a sample in about 7–14 days. You review, send precise feedback, and approve a golden sample for production. See our custom eyewear sampling process for that stage in detail.
Turn your design into frames
Send us a sketch, drawing or reference sample and we’ll build the tech pack with you, then produce a sample. Start your design — our team replies within 24 hours with feasibility, materials and a sample plan.