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Here’s something most lingerie startups don’t realize until they’ve already burned through their first production run: plus size bras are not just regular bras in bigger sizes.

We’ve been manufacturing bras at our Shantou factory since 2003. And the number one mistake we see from new brands entering the plus size market? They take their standard bra pattern, scale it up 30%, and call it a day.

That doesn’t work. Here’s why, and what to do instead.

The Plus Size Market Is Massive — And Underserved

Quick reality check.

68% of American women wear a size 14 or above. In the UK, the average bra size is now 36DD. The plus size intimate apparel market hit $12.4 billion globally in 2024 and it’s still growing.

Yet walk into most lingerie stores and count how many options exist above a 38D. Maybe five styles? Usually in black, beige, or white. Maybe a sad purple if you’re lucky.

Brands know this gap exists. That’s why we get more inquiries about plus size bra manufacturing now than any other category. But knowing the market exists and actually making a good product for it — those are very different things.

Why Scaling Up Standard Patterns Fails

A 34B bra and a 44G bra face completely different physics.

Gravity, weight distribution, shoulder strain, band tension — everything changes as you go up in size. A bra that works at 34B might be structurally useless at 44G even if every measurement was proportionally scaled.

The specific problems we see:

Band rides up. The most common complaint. In larger sizes, the band carries most of the support load (not the straps, despite what most people think). A standard elastic band that works fine at 34-36 will stretch out and ride up within hours at 42-46. You need wider bands — we use 7.5cm minimum for sizes 40+ — and stronger elastic with higher recovery rate.

Straps dig in. Standard 1.5cm straps create pressure points on larger busts. We switched to 2.5cm padded straps for our plus size line and cut strap-related complaints by 60%. Not an exaggeration — we tracked returns across three brand partners over 12 months.

Gore doesn’t tack. The center piece between the cups (the gore) should sit flat against the chest. On plus size bras made from scaled-up patterns, it floats. This means the cups aren’t properly separated and support is compromised. The fix is adjusting the gore angle and width independently from the cup scaling.

Underwire pokes. Longer underwires bend differently under load. The tips migrate toward the armpit. We use reinforced wire channels with silicone-tipped wire ends for sizes 38+ to prevent this. It costs about $0.15 more per unit. Worth every cent in avoided returns.

What Good Plus Size Construction Looks Like

We’ve refined our plus size patterns over 15+ years of production. Here’s what we’ve landed on:

Three-part cup construction. Not two-part. A three-part cup gives better shape and distributes tension across more seam lines. The top panel controls projection, the side panel controls width, and the bottom panel handles lift. Each can be adjusted independently.

Side boning. Most regular bras don’t need it. Plus size bras absolutely do. We insert flexible boning in the side panels from 38D and up. It prevents the bra from folding or collapsing under the arm and keeps the cup shape stable throughout the day.

Power mesh back panel. Forget satin or basic cotton for the back. Power mesh (usually nylon/spandex blend, 70/30) provides firm support without bulk. It breathes, it stretches just enough to be comfortable, and it snaps back after washing. Our plus size line uses 4-hook closures minimum, 5-hook for F+ cups.

Leotard-back or U-back design. Standard straight-across backs have a tendency to bow outward on larger frames. A U-back or leotard-back design anchors the band lower and distributes pulling force more evenly.

Wireless Plus Size — It’s Possible, But Tricky

The market is screaming for wireless plus size bras. Every brand wants to offer them.

But here’s the engineering challenge: without wire, you lose the primary structural element that defines cup shape and separates breast tissue. For A-C cups, no big deal — molded foam or bonded fabric handles it. For D+ cups, you need something more.

What we’ve found works:

Graduated density foam. Thicker at the base, thinner at the top. This creates a natural shelf effect without wire. We source this from two foam suppliers — one in Dongguan, one in Shantou. The cost premium over standard foam is about 20% but the performance difference is significant.

Internal sling construction. A separate support panel inside the cup that acts like a hammock. It carries the weight while the outer cup provides shape. This is harder to manufacture — it basically doubles the cup construction — but it’s the closest thing to underwire support without actual wire.

Wide elastic underbust band. 10cm minimum. This becomes your primary support structure. It needs to be firm enough to stay put but stretchy enough to breathe. We use a custom elastic with 40% recovery (meaning it springs back to 60% of its stretched length). Standard elastic is around 25% recovery.

The Size Range Question

New brands always ask: “What sizes should we offer?”

Start here: 36C to 48DDD (F).

That covers about 80% of the plus size market with manageable SKU complexity. You’re looking at roughly 30-35 size combinations.

Don’t try to launch with 50+ sizes on day one. We’ve seen brands order 60 sizes, spread their MOQ thin across all of them, and end up with inventory problems in the sizes that actually sell. Start focused, check your sales data after 90 days, then expand where demand shows up.

For reference, our top-selling sizes across all plus size brand partners:

1. 38DD
2. 40D
3. 42DD
4. 38D
5. 44D

If you’re tight on budget, those five sizes alone will cover a surprising chunk of demand.

MOQ and Cost Reality

Let’s talk numbers, because this is where brands either commit or walk away.

Standard MOQ for plus size bras: 300-500 pieces per style per color. Some factories quote 1,000+ minimum. We start at 300 because we keep core plus size fabrics and components in stock year-round.

Unit cost range: $3.50 to $9.00 depending on construction. A basic wireless bralette in plus size is on the lower end. A fully-boned underwire with three-part cups and power mesh back is on the higher end.

Sample cost: $50-80 per style. Sample development takes 10-15 days. We always recommend ordering two rounds of samples — first to nail the fit, second to confirm the corrections.

Grading cost: If you provide a base pattern in one size, we grade it across your full size range for $200-400 per style. If you need us to develop the pattern from scratch based on a tech pack, that’s $300-500. Both costs are typically credited against your first production order.

What to Send Your Factory

If you’re ready to start production, here’s what we need from you:

A tech pack. Doesn’t have to be fancy. It should include:

• Target size range
• Fabric preferences (or let us recommend)
• Construction details (wired/wireless, number of hooks, strap style)
• Reference images of the look you want
• Pantone colors
• Label and packaging requirements

No tech pack? That’s fine too. We do ODM — bring us a concept or even just a competitor sample, and our design team develops the technical specs.

En résumé

Plus size is not a niche anymore. It’s a core market that most lingerie brands underproduce for. The brands that get the construction right — proper band support, three-part cups, padded straps, side boning — they build loyalty fast because plus size customers are desperate for bras that actually fit.

We manufacture plus size bras for brands across the US, Europe, Australia, and Southeast Asia. If you’re looking to develop or improve your plus size line, we’ve got 20+ years of pattern development and production experience to back it up.

Reach out for samples — we’ll send you our best-selling plus size styles so you can feel the construction quality firsthand.

Ready to develop your plus size line? Contactez TELIGE to discuss your requirements, or browse our gamme de produits to see what we manufacture.