Custom Sunglasses Manufacturing Cost Factors: What Determines Your Price Per Piece

Ask three eyewear factories to quote the same sunglasses concept, and you can easily end up with three very different numbers — one at $4 per piece, one at $9, and one that won’t commit to a figure until they’ve seen a sample. None of them are necessarily wrong. They’re usually just pricing different things, or making different assumptions about material, mold ownership, and order size.

For a brand trying to budget a first collection, that variation is confusing. This guide breaks down the specific factors that move the price per piece up or down, so you can read a quote accurately instead of just comparing the number at the bottom.

What “manufacturing cost” actually includes

The phrase gets used loosely, and that’s part of why quotes look so inconsistent. In practice, a sunglasses price can refer to several different things:

• Ex-factory unit price — the cost per piece once production is running, before shipping or duties
• Mold or tooling cost — a one-time fee tied to a specific design, separate from the per-piece price
• Sample cost — often higher per piece than bulk production, since it’s a one-off run
• Total landed cost — unit price plus freight, duties, and any packaging or compliance costs

A supplier quoting a lower per-piece number isn’t necessarily cheaper overall if that number excludes tooling, or if it’s based on a higher minimum quantity than you actually plan to order. Worth clarifying upfront which of these numbers you’re being given.

Material is usually the single biggest driver

Frame material sets the floor for your cost before anything else is factored in:

• Acetate sits in the mid-to-premium range. It’s cut and polished from sheet rather than molded, which means more manual finishing labor — richer color depth comes at the cost of more hands-on production time.
• TR90 is generally the most cost-efficient at scale once a mold exists, since it’s injection molded rather than hand-finished. The tradeoff is a mold investment upfront and a higher MOQ to make that investment worthwhile.
• Stainless steel falls in a similar range to acetate — durable and workable, without the premium of precious or rare-earth metals.
• Titanium is the most expensive of the four. Both the raw material and the machining required to work it push the unit cost well above the others, which is why it’s typically positioned for premium collections.

Combining materials — acetate fronts with metal temples, for example — adds a joining step and typically lands between the two base materials in cost, not simply the average of both.

Design complexity and customization level

A style built from an existing mold with minor color or logo changes will always price lower than a fully custom shape. Complexity that adds cost includes:

• Multi-piece construction (spring hinges, interchangeable parts, metal-acetate combinations)
• Non-standard hinge or temple mechanisms
• Tight tolerances on curve, wrap, or fit
• Multiple colorways or lens tints in the same style, each requiring separate setup

None of this means custom designs aren’t worth doing — it just means the cost difference between “close to an existing style” and “built from zero” should be part of the conversation before sampling starts.

Mold and tooling investment

For fully custom acetate, metal, or TR90 designs, mold cost is a one-time fee, separate from the per-piece production price. It’s tied to the design, not the order — a larger order doesn’t cost more in tooling, but it does spread that fixed cost over more units, lowering its effective impact on your per-piece price.

This investment is not the same size across materials. Acetate and metal tooling tends to be a smaller cost, since the mold is doing less of the shaping work than in injection molding. PC and TR90 styles rely on injection molding for the entire frame, so the mold itself is a bigger, more precise piece of tooling — and the fee reflects that. For PC/TR90 projects specifically, since this is often the largest single upfront number a new brand sees, it’s worth asking whether it can be broken into stages rather than paid as one lump sum — some factories, including ours, are able to structure design and tooling as separate checkpoints (2D drawing, 3D drawing, RP sample, then mold) rather than a single upfront commitment.

Order quantity and batch efficiency

Material purchasing, machine setup, and QC all have fixed costs per production run, regardless of quantity. Spreading those fixed costs over more pieces is the most direct way to lower your per-piece price — which is why MOQ tiers exist in the first place, and why the same design can price differently at 300 pieces versus 1,000. For a fuller breakdown of how MOQ is typically structured by material and colorway, see our private label eyewear MOQ guide.

Multiple colorways within one style also affect this — each color is close to its own mini production run for setup purposes, even if the total order quantity looks large on paper.

Lens options

Lens material and treatment stack on top of frame cost:

• CR-39 — the standard resin option, reliable optical clarity, generally the most affordable
• Nylon — more impact-resistant, common for sport-oriented styles, priced above CR-39
• TAC — typically used as the base for polarized lenses, a cost-effective way to offer polarization
• Polarized, gradient, mirror, or photochromic treatments — each adds a processing step and cost on top of the base lens material

Mixing treatments (e.g., polarized and gradient on the same lens) compounds rather than replaces these costs.

Edge finishing is a smaller but easy-to-overlook cost factor too — a standard flat edge is the default, while beveled or faceted edges (cut at an angle for a more dimensional look) add an extra cutting step and typically cost a bit more per piece.

Packaging and branding add-ons

Logo application method has its own cost range — laser engraving, hot stamping, printed logo, and metal inlay all differ in setup cost and per-piece cost depending on material and placement. Our guide to eyewear logo branding methods compares these in more detail if you’re still deciding between them.

Packaging — cases, pouches, cleaning cloths, retail boxes — is priced separately from the frame itself, and can range from a simple branded pouch to a multi-component retail box set. It’s easy to budget the frame carefully and forget that packaging is its own line item with its own MOQ.

Shipping, duties, and total landed cost

The ex-factory price is rarely the number that matters for your actual budget. Freight (air vs sea), destination country import duties, and any compliance testing or documentation costs all sit on top of it. Two suppliers quoting the same ex-factory price can result in very different landed costs depending on where they ship from, how they package for freight, and what documentation they provide upfront versus what you have to source separately.

How to compare quotes from different suppliers

When quotes don’t match up, it’s usually because they’re not pricing the same thing. Before comparing numbers side by side, check whether each quote:

• Specifies the exact material grade and thickness (not just “acetate” or “metal”)
• States whether mold/tooling cost is included, separate, or not yet quoted
• Confirms the lens type and treatment, not just “polarized” without specifying the base material
• Clarifies whether the sample cost is credited against a future bulk order
• Includes or excludes packaging, and to what level of detail

A supplier unwilling to break a quote down into these components is harder to evaluate fairly — and worth being cautious about for reasons beyond just pricing. For a broader checklist on supplier evaluation, our guide to choosing a private label eyewear manufacturer covers what else is worth confirming beyond cost.

FAQ

Why do sunglasses manufacturing quotes vary so much between suppliers?

Most of the variation comes from different assumptions, not different pricing philosophies — one supplier may include mold cost in a blended number, another may quote it separately; one may assume a higher MOQ than you’re planning. Ask each supplier to break the quote into ex-factory unit price, mold/tooling (if applicable), and any packaging, so you’re comparing the same components.

Does a lower per-piece price always mean a better deal?

Not necessarily. A lower number sometimes reflects a lower material grade, a higher MOQ that doesn’t match your order size, or a quote that excludes tooling and packaging you’ll still need to pay for separately. It’s worth confirming what’s included before treating the lowest number as the best deal.

Is the mold fee a one-time cost or does it repeat every order?

One-time. Mold and tooling costs are tied to the design itself, not the order size or frequency. Once the mold exists, reorders of the same style are priced at the per-piece production rate without another tooling fee, unless the mold needs replacing after very high-volume use.

How much does logo branding add to the unit cost?

It depends on the method — printed logos and hot stamping tend to add the least per piece, while metal logo plates and crystal inlays add more due to the additional component and application step. Our logo branding guide breaks down the relative cost and durability of each method.

What’s a realistic cost range for a first private-label order?

It varies too much by material and design to give one number responsibly — a simple TR90 style using an existing mold prices very differently from a fully custom titanium frame. The more useful approach is sharing your target retail price and rough specs with a manufacturer directly, so the cost breakdown is based on your actual project rather than an industry-wide average that may not apply to it.

Getting a cost breakdown you can actually compare across suppliers is usually less about finding the lowest number and more about making sure everyone is quoting the same thing — which is easier to sort out early than after a deposit is paid. If you’re at the stage of turning a concept into real numbers, our private label eyewear page walks through how we structure that conversation from first inquiry through to a sample quote.