How to Start a Swimwear Line: A Step-by-Step Guide for 2027

To start a swimwear line, you pick one customer, choose 3 to 5 ready designs and make them your own. Then you sample them, order bulk from 20 pieces per style, and launch to people who are already waiting. Custom styles come later, once you know what sells.

That’s the whole job. The hard part is doing it in the right order, with real numbers instead of guesses.

This guide covers the parts that happen inside a factory: tech packs, sampling, sizes, labels and lead times. We’ve run a swimwear factory in Bali since 2014, making swimwear for brands in 70+ countries.

Whether you’re working out how to start a bathing suit line or starting a swimsuit line, the steps are the same. Each step uses the minimums, costs and lead times from our own price list. Some numbers depend on your order, like lead times on custom work, and we flag those instead of guessing.

How to start a swimwear line: the 10 steps at a glance

There are 10 steps, and the order matters. Your early choices (customer, route, styles) set the cost and timeline of everything that follows.

1. Pick one customer. Decide who it’s for and what gap you fill.
2. Choose your route and manufacturer. Ready designs first, custom only where you need it.
3. Plan 3 to 5 styles that work together.
4. Choose your fabric from what the factory already stocks.
5. Make ready designs your own with fabric, color, print, hardware and labels.
6. Sample and fix the fit before you order anything in bulk.
7. Split your sizes with the weight in the middle.
8. Lock your name and logo before sampling, then labels and packaging while you sample.
9. Order bulk production from 20 pieces per style and color.
10. Shoot, build your store and launch to an audience you started building during production.

How long does it take to start a swimwear line?

On the Shop Ready Design route, factory time adds up to roughly 5 to 9 weeks, plus delivery. That’s about a week for samples, then 4 to 8 weeks of bulk. Team-Assisted Ready Designs and Fully Custom styles add steps first: print strikes, patterns and sample rounds. Their timing is confirmed at order.

Step 1: Who is your swimwear line for?

Pick one specific customer with one problem nobody solves well for them. “Swimwear for women” is not a customer. “Swimwear for active women who want sculpting support and minimal designs” is. Defining your target customer sets your price, your style, fabric and the kind of factory you need.

Start with three questions. Who do you design for? What gap do you fill? Why should this brand exist?

When you’re starting a swimwear line, a narrow customer feels risky. It isn’t. It makes every later decision faster, and it keeps a first collection to 3 to 5 focused styles.

Some examples of a real customer:

• Surfers who need a top that stays put through a duck dive.
• Women with a larger bust who can’t find support in a triangle top.
• Mothers who want full coverage without a dated cut.
• Customers in the Middle East looking for modest swimwear that still feels current.

Find what’s missing. Many founders start a swimwear line because they couldn’t find a suit that worked for them. If that’s you, write down exactly what was wrong: the fit, the coverage, the support or the fabric. If it isn’t, ask people who match your customer what frustrates them about the swimwear they own.

Look at the brands they buy now. Find 2 or 3 swimwear brands your customer already shops from. Read their 1-star and 3-star reviews and look for complaints that repeat.

Check what those brands charge. Note the price of their bikini top, bikini bottom and one-piece. That’s what your customer is used to paying. Say a brand your customer buys charges $60 for a top. A basic top costs you $16 to make at 100 pieces. The $44 left on each piece has to cover shipping, duties, marketing and your profit.

Step 2: Ready designs or custom: which route fits?

Most first lines should start on ready designs and add 1 or 2 custom hero styles. Go fully custom once you know what sells.

Want to know how to start your own swimwear line without a design background or a big budget? Start with ready designs. Here’s how the three routes compare.

Shop Ready Design: You order our existing designs online. You choose from the options on each product page, such as fabric, color, label or hardware.

Team-Assisted Ready Design: You start from our existing patterns, and our team helps you change the fabrics, colors, prints, hardware, labels and packaging. The shape stays ours, so there’s no development fee.

Fully Custom Design: We develop your own shapes from your references, with a US$99 development fee per design.

You can mix Team-Assisted Ready Designs and Fully Custom Designs in one order of 250 pieces or more. Both ready routes carry your own label, so it helps to know how private label vs white label differ.

What about a traditional bulk factory? Minimums of 50 to 300 units per style per colorway are commonly quoted. So are lead times of 12 to 20 weeks. Our minimum is 20 pieces per style and color. With 100 pieces, that’s 5 styles with us. At a 50-piece minimum, it’s 2. At 300, it’s none.

What to look for when choosing a swimwear manufacturer:

• Low minimums
• Development support: patterns, fabric sourcing and fit
• Transparent pricing
• Experience with startup brands

What we’ve seen: for a first season, we recommend ready designs for most or all of the collection. You skip development fees and start from 100 pieces. Put the money you save into photos and your launch. If you have one shape nobody else makes, add it as a custom hero style. That costs US$99 in development and moves your order to the 250-piece minimum, where ready and custom styles can be mixed.

Step 3: How many styles should your first swimwear collection have?

Start with 3 to 5 bikini and swimsuit styles that work together, each ordered from 20 pieces per style and color. A small, tight collection costs less to sample and is easier to sell through.

Think of it as a capsule collection: a few pieces that mix.

Design for production. Every extra seam, piece of hardware and adjustable strap is one more thing to develop, source and check. Keep the cuts clean, check that your fabric suits each shape, and build around a few strong core silhouettes.

Tops and bottoms. Selling them separately lets customers buy different sizes for each. Each top and each bottom is its own style, with its own 20-piece minimum.

Colors. Stick to one or two colors or prints per style. Each color is a separate 20-piece run. Here’s the math for a typical first order:

• 2 tops and 2 bottoms = 4 styles
• 2 colors each = 8 runs
• 8 runs × 20 pieces = 160 pieces, which clears the 100-piece shop minimum

What we’ve seen: simple styles often sell better than complex ones. They fit more body types, reorder easily and hold stronger margins. What makes them yours is branding, styling and photos.

Step 4: What fabric should you use for a swimwear line?

Choose a recycled stretch fabric your factory already stocks. For a first line, Carvico VITA is a safe pick: 78% recycled polyamide (ECONYL®) and 22% elastane, at 190 g/m². In most cases, line it with the same fabric. Stocked fabric is also what makes 3-day samples possible.

Why VITA. There’s no single best fabric for swimwear, but VITA is our best-seller and has the widest color range we stock. It’s thin, soft and breathable, and the mill holds a GRS certificate for it.

Lining. We usually line suits with the same fabric as the outside. The exception is a textured outside, which needs a flat lining. Some light colors, like white, need a third layer so the suit isn’t sheer.

Prints. Our women’s prints go on Carvico Brisbane Recycled: 82% recycled polyester and 18% elastane at 190 g/m². The mill holds GRS and RCS certificates for it. We print in-house in Bali and approve a print strike before cutting. Full specs for every fabric we stock are in the Fabric Explorer.

Sustainability. Building a sustainable swimwear brand is also about how much you produce, how you package and how long the suit lasts. With a 20-piece minimum per style, you can test the waters and see which styles sell. Reorder those, and you’re not stuck with leftover stock your customers never wanted from your brand.

Want to see our work before you choose? Order the Starter Kit.

Step 5: How do you make ready designs your own?

Start from a ready design and change what makes it yours: fabric, color, print, hardware, labels and packaging. You only need a tech pack if you add a fully custom style, and even then sketches and references are enough to start.

On the shop route, pick the options on each product page. On the team-assisted route, send our team your style list and the changes you want. Neither route has a development fee. Print and logo work is priced per job:

• Print strike and digital mock-up: US$25
• Print placement: US$35 per style and size
• Logo rework: US$35

Adding a custom style: tech pack or references?

If no ready shape fits your customer, add a custom style. Development costs US$99 per design, covering pattern and grading, and half is credited back when you produce it.

Part of learning how to start a swimsuit line is learning to talk to a factory. Start from a sketch or a reference picture. When you’re ready for a full tech pack, it has five parts:

1. Sketches: all views, plus detail close-ups.
2. Spec sheet: points of measure.
3. Graded spec: measurements for every size.
4. Bill of materials: every material and trim.
5. Reference images: the fit, finish or feel you want.

We accept tech packs in any format, plus DXF and DGS pattern files. We sign an NDA with every brand we work with.

Step 6: How does swimwear sampling work, and what does it cost?

Ready design samples cost 3× the bulk unit price, with no development fee. On the shop route, they have no minimum, take 3 days on in-stock fabric and ship by DHL in 5 days. Custom styles add US$99 development per design and usually take 1 to 3 rounds.

Sampling ready designs

If the bulk price of a basic top is $16, its sample costs $48. Use it to check fit on your customer, how the fabric and color look in daylight, and whether the size runs true.

Can’t test on your customer yourself? Book our Fit Model Service: US$150 an hour, a model matched to your market, a live video call and photos. For prints, approve the print strike before anything is cut.

Sampling a custom style

1. Prototype. It checks fit, proportions, fabric behavior, support and construction. It’s for learning, not perfection.
2. Fit review. Try it on your target customer, or use the Fit Model Service.
3. Revisions. Fix what the fit review found. Revisions aren’t included in the US$99 development fee.
4. Pre-production sample (PPS). One per style, in one size, at 2× the bulk price. It’s your last chance to make changes.

Constant redesigning is what slows sampling down.

What we’ve seen: sample your first custom styles in white or black, all in the same size. A plain sample shows fit problems a busy print hides. One size lets you compare styles side by side.

Step 7: How do you split sizes on a first order?

Put most of your pieces in the middle sizes. For an XS to L range, a 24-piece run splits as 5 XS, 7 S, 7 M and 5 L.

There’s no minimum per size, only at least 20 pieces per style and color. Our range runs XXS to XL, adjustable to your market. If your customer runs larger, shift the weight up the range.

Step 8: Brand name, labels and packaging: what do you need?

Lock your name and logo early, then decide labels, hang tags and packaging while you sample, because open branding holds up the bulk start. In the US, labels must show fiber content, country of origin and who’s responsible for the product.

Brand Name. Check that the brand name, domain and social handles are free before you commit.

Logo. Have your logo ready before your first sample, because logo placement, labels and packaging are decided at the sample stage. It goes on your labels, packaging and marketing, so keep it consistent everywhere. No logo yet? Our branding service can create one, so it’s ready when sampling starts.

The standard pieces. Our standard branding set is a heat-transfer label, a hygiene liner and a hang tag. All three are included from 500 pieces. Below 500 pieces, branding isn’t included in the unit price, so budget for it separately.

US label rules. US businesses can apply to the FTC for an RN number and print it instead of their business name. Care instructions are required under the FTC Care Labeling Rule. Other markets have their own rules, so check them before you print.

What we’ve seen: brands approve their samples, then leave labels or packaging for later. Bulk can’t start until every branding item is settled. Decide them in the same weeks you’re sampling.

Step 9: How many pieces do you need for a first bulk order?

Shop orders start at 100 pieces in total, with 20 per style. Team-Assisted Ready Design and Fully Custom orders start at 250. Shop bulk takes 4 to 8 weeks, and manual orders get their lead time when you order.

Once you approve, here’s how production works: materials, cutting and sewing, quality checks, packing and DHL delivery. Everything is cut and sewn in our solar-powered factory in Bali. You pay duties and taxes as the importer.

Price per piece. A basic women’s top or bottom costs $16 at 100 to 249 pieces, falling to $10 at 1,000 to 2,999. That’s only one part of what it costs to start a swimwear line, alongside samples, branding and shipping.

Step 10: Photos, store and launch: how do you launch a swimwear line?

Book your photos and build your store while production runs. Start marketing before the stock lands, so people are waiting. Then launch lean and restock what sells.

If you’re figuring out how to start a swimwear brand, production is only half of it. On the shop route, the 4 to 8 weeks of bulk production are your pre-launch window.

Photos and video. Shoot as soon as your approved samples land, so content is ready the week stock arrives. Plan three types of shots:

1. Clean product shots: each style on a plain background, for your store listings.
2. Catalog shots on model: show fit, coverage and how each style moves on the body.
3. Campaign shots: set the mood for the collection and the vibe of your brand, so the market knows what kind of brand you are.

Use the same content on social media to build hype before launch. Starting early gives you weeks of teasers, behind-the-scenes clips and reveals, not just a single launch post. Our Photo and Video Production service can plan and run all three shoots for you.

Store. Sell through your own online store and your social channels. Your store is where you control pricing, customer data and the full brand experience, so set it up before launch day, with product pages, size charts and shipping details ready. Then use social to send people straight to the new collection. If you’d rather hand this off, our e-commerce build service can set up your store for you.

Test demand first. Offer pre-orders or a limited first drop to build excitement and see what sells.

Three phases. Plan marketing your swimwear brand in three phases:

1. Pre-launch. Ask your audience what they want, and share the making-of.
2. Launch week. Release your photoshoot content and open the drop.
3. Post-launch. Push best-sellers, collect reviews and customer photos, and publish style guides.

Launch checklist:

• Brand name, domain and social handles secured
• Product pages list sizes, fabric content and care
• Shipping, delivery times and returns (with hygiene rules) visible before checkout
• Photos and video shot with approved samples
• Email list live and collecting sign-ups
• Pre-order or drop date set and announced
• Stock counted and loaded by size
• Answers ready for the sizing questions you’ll get

Swimwear business plan: the 11 steps, plus a free template

A swimwear business plan fits on one or two pages: customer, offer, route, budget, timeline and launch. Write it before you pay for samples.

For anyone asking how to start a swimwear business, the plan is where the 10 steps above become numbers you can check. Use these 11 headings:

Download the template: our free swimwear business plan template is a Google Doc you can copy.

How can AI help you start a swimwear line?

AI is good at the thinking and writing work: finding a niche, drafting your plan, naming styles and writing product pages. It can’t fit a sample, price a suit or tell you what a factory can make. Use it to move faster, then check its answers against real quotes and samples.

Prompts for each step. Copy these into any AI chat tool and fill in the brackets:

Design ideas, not designs. An AI image is a good way to show a factory your idea, but it isn’t a production-ready design. AI can draw details that look convincing but can’t be built, like unclear panel joins, unrealistic proportions or cutouts too small to sew. That’s why using AI for your swimwear design works best alongside real product references and clear notes on fit, coverage and hardware.

Check the numbers yourself. AI can get costs, minimums and fabric specs wrong. Check costs against a real factory quote and fabric specs against the Fabric Explorer.