A Practical Guide for Collection Planning
Planning a new swimwear collection or looking for gaps in your current range? Understanding the main types of swimsuits makes it easier to compare shapes, coverage, and intended use, then build a more balanced product mix. From one-pieces and bikinis to tankinis, swim dresses, rash guards, and swim shorts, this guide shows the differences between the most common styles.
Types of Swimsuits at a Glance
Start with these six common swimsuit types and the main differences in shape, coverage, and use.
| Swimsuit type | How to recognize it | What it offers |
|---|---|---|
| One-piece swimsuit | One connected garment covers the torso. Necklines, straps, backs, legs, and sleeves vary. | A connected shape that ranges from classic and active styles to fuller-coverage designs. |
| Bikini | A separate top and bottom may be sold as a set, as separates, or both. | Flexible top-and-bottom combinations with varying support, rise, and coverage. |
| Tankini | A longer swim top is paired with a separate bottom. | More torso coverage while retaining a two-piece structure. |
| Swim dress | A dress-like swimsuit with a skirt layered over an inner brief or shorts. | A dress-inspired outline with added coverage at the hips or upper legs. |
| Rash guard set | A short- or long-sleeve top is paired with briefs, shorts, a skirt, or leggings. | More arm coverage and a choice of coordinating bottoms. |
| Swim shorts | A shorts-shaped bottom comes in a range of lengths, fits, waistbands, and linings. | Choices for pool, beach, surf, and casual use. |
One design may fit more than one label. For example, the same swimsuit can be one-piece, one-shoulder, and high-cut.
Types of Women’s Swimsuits
From one-pieces and bikinis to tankinis, swim dresses, and rash guard sets, you have a broad choice of shapes, coverage levels, and styling details.
One-Piece Swimsuit Styles
Changes to the neckline, straps, cut-outs, leg openings, and sleeves create many types of one-piece swimsuits.
Classic Tank One-Piece
Two shoulder straps and a clean, familiar outline define the classic tank. Scoop or square necklines, open or higher backs, and print changes give this dependable shape a fresh look. It works well as an everyday style for the pool or beach.
Strapless or Bandeau One-Piece
With no fixed shoulder straps, the bandeau creates a clean line across the chest. Removable straps give the wearer another way to style the suit. Depending on the design, cups, an underband, or other internal structure help the top stay in place.
Plunge or V-Neck One-Piece
The angled front of a V-neck may be shallow or deep, while a plunge extends farther down the chest. This difference lets you choose between a subtle neckline detail and a more open look for beach or resort wear.
One-Shoulder One-Piece
Covering one shoulder and leaving the other bare creates a strong asymmetric outline. A wide strap feels bolder than a narrow strap or tie. The neckline already gives the suit a focal point, even in a solid color.
Cut-Out One-Piece and Monokini
Cut-outs reveal selected areas at the waist, sides, front, or back. Small openings add detail; larger ones make a connected suit look closer to a two-piece. Some markets call these designs monokinis, but the term is not used consistently. Not every cut-out one-piece is a monokini.
High-Cut One-Piece
Higher leg openings create a longer-looking leg line and sit farther up the hips. Leg height and back coverage are separate choices, so a high-cut front may still have a fuller back.
Long-Sleeve One-Piece
Long sleeves add arm coverage to a connected suit. Necklines, zippers, and leg openings take the design from simple and sporty to more decorative. The shape suits surf, swim, or sunwear, although not every long-sleeve one-piece is a rash guard.
Bikini Top Styles
Bikini tops vary in neckline, cup shape, straps, and the amount of fabric below the bust. The same bottom can create a different look with each top, while the complete construction determines fit and support.
Triangle Bikini Top
Triangular cups create a simple, open shape. Sliding cups move along the lower tie, so their position and spread can be adjusted. Fixed triangles stay in place more consistently. The difference affects adjustability and how consistently the cups stay in position.
Scoop-Neck Bikini Top
Characterized by a rounded neckline, the scoop-neck top pairs easily with simple briefs or high-waisted bottoms. Narrow straps keep the outline light; wider straps and a cropped body move it in a sportier direction.
Halter Bikini Top
Halter straps run around the neck and leave the shoulders open. Tie straps allow some adjustment, whereas fixed bands or clasps hold a more defined shape. Support also depends on cup construction and strap width, not the neckline alone.
Bandeau or Strapless Bikini Top
The bandeau wraps across the chest without fixed shoulder straps. Straight, gathered, and twisted fronts change the look without changing the basic outline. Removable straps add flexibility, while the band and internal structure affect how securely the top stays in place.
Underwire Bikini Top
Wires beneath the cups help shape and support the bust. Neckline, cup coverage, and padding may range from open to fuller styles. The final fit comes from the cup, band, wire, and straps working together.
Longline Bikini Top
Extending farther below the bust, a longline top has the look of a cropped swim top and covers more of the upper torso. The longer body changes the silhouette, but it does not guarantee stronger bust support.
High-Neck Bikini Top
More fabric across the upper chest gives this top its higher neckline. Open backs, racerbacks, and varied armholes change the silhouette while keeping the front covered. It creates a sporty look without the length of a full swim top.
One-Shoulder Bikini Top
One strap and one bare shoulder form an asymmetric outline. Knots, gathers, or a wider shoulder panel provide enough detail to make the top stand out. A simpler bottom keeps attention on the neckline.
Bikini Bottom Styles
To compare bikini bottom types, look at waist height, side width, leg opening, and back coverage as separate features. A high waist, for example, does not tell you how much of the back is covered.
Classic Bikini Bottom
The classic bottom follows a brief-like outline without short legs or a skirt layer. It pairs with most bikini tops and works as a useful base style. Rise, side width, and back coverage still vary, so “classic” does not always mean full coverage.
High-Waisted Bikini Bottom
Rising toward or above the navel, this bottom covers more of the lower torso than a low-rise brief. It changes the proportion of a bikini, especially beside a smaller top. Back coverage may still be full or revealing.
Hipster Bikini Bottom
A hipster sits around the hips rather than the natural waist. Its sides are usually wider than those of a string bottom, giving it a broad, low waistband without the torso coverage of a high-waisted cut.
High-Cut Bikini Bottom
The leg openings sit higher at the hips, creating a sharper leg line. That line works with low-, mid-, or high-rise waists. Back coverage remains a separate decision, so high-cut does not automatically mean cheeky.
Cheeky, Brazilian, and Thong Bottoms
These names refer to lower-back-coverage cuts, but they do not form a universal scale.
- Cheeky: Part of the buttocks remains exposed, often through a narrower or curved back panel.
- Brazilian: The back is often narrow or tapered, although its shape may overlap with cheeky cuts in some markets.
- Thong: A narrow strip or panel leaves most of the buttocks exposed.
Clear back views are more reliable than the style names alone.
Tie-Side Bikini Bottom
Ties at the hips add a visible detail and may allow the sides to loosen or tighten. Decorative ties attached to fixed sides do not provide the same adjustment. The width of the sides and shape of the back also affect the finished look.
Boyshort Bikini Bottom
Short legs distinguish the boyshort from a brief and cover more of the hips or upper thighs. Some extend only slightly below the crotch; others look closer to fitted shorts. Either shape can be paired with a bikini or tankini top.
Skirted Bikini Bottom and Swim Skort
A skirted bottom layers a skirt over an inner brief. A swim skort uses shorts underneath instead. Skirt length and the inner garment affect coverage as well as comfort during movement.
Selling tops and bottoms separately allows customers to pair sizes, but it also creates more stock combinations to manage.
Tankinis
A tankini pairs a longer swim top with a separate bottom. The top may finish near the waist or extend over the hips, providing more torso coverage than most bikinis. Briefs, shorts, and skirted bottoms each change the overall look. When pieces are sold separately, the top and bottom can be selected in different sizes.
Swim Dresses and Skirted Swimwear
The dress-like outline comes from a skirt that falls over the hips or upper thighs. Some swim dresses have an integrated one-piece or brief, while others pair a longer top with a separate bottom. A close-fitting skirt feels quite different from a flared shape, even at the same length.
Three-Piece and Coordinated Sets
Three-piece sets often add matching shorts, a skirt, or a rash guard to a bikini or tankini. The extra piece lets the wearer adjust the outfit for the activity or desired coverage. You may sell the pieces together, separately, or in both formats.
Burkinis and Modest Swimwear
A burkini usually combines a longer top with swim pants and may include a separate or attached head covering. Top length, fit, and the number of pieces vary. Other modest swimwear uses similar combinations with more body coverage, so one fixed outfit does not define the category.
Rash Guard Sets and Swim Shorts
A sleeved rash guard paired with swim shorts forms a practical set for surf, pool, or beach use. Tops may fit close to the body or feel more relaxed. Bottoms range from short, fitted shapes to looser cuts with longer legs.
Types of Men’s Swimwear
Men’s swimwear styles range from close-fitting briefs and jammers to relaxed trunks and board shorts. Swim tops and connected suits add coverage for particular activities.
Swim Briefs
Close-fitting swim briefs leave most of the legs uncovered. Side width and waist height alter the appearance while preserving the compact shape. They suit swimming when a loose short is not wanted.
Swim Trunks and Shorts
Men’s swim shorts and trunks usually have a relaxed fit and an elastic waistband. Leg length, drawstrings, pockets, and linings create the main variations for pool and beach wear. Mesh briefs, fitted inner shorts, and unlined designs also feel different against the body.
Swim Jammers
Jammers fit closely and extend down the thighs, often toward the knees. Their longer, fitted shape is familiar in swim training. Fabric and fit influence how freely the wearer can move.
Board Shorts
Designed with surfing and active beach use in mind, board shorts often have a fixed waistband and lace-up closure. Newer versions may add stretch fabric or elastic sections. Waistband construction, fabric, lining, and freedom of movement distinguish them more clearly than length alone.
Rash Guards and Swim Tops
Short or long sleeve swim tops pair with trunks, briefs, or board shorts. Rash guards commonly fit close to the body, while other swim tops feel looser. Sleeve length and body shape help match the top to its intended activity.
One-Piece Rash Guard Suits
This more specialized suit connects the top and bottom, usually with a zipper for access. The joined construction helps prevent a separate top from riding up. Sleeve and leg lengths vary with the intended use.
Types of Kids’ and Baby Swimwear
Kids and babies share many swimsuit shapes, but age changes the proportions, dressing access, and room needed for a swim diaper.
One-Piece Swimsuits and Sunsuits
One-piece designs join the top and bottom, with variations in straps, sleeves, and leg length. Sunsuits often cover more of the arms or thighs. These styles come in different designs for girls, boys, and babies, with proportions adapted to age and intended use. For babies, generous openings and easy access make dressing and diaper changes simpler.
Two-Piece Swimsuits
Bikinis and tankinis combine separate tops with briefs, shorts, or skirted bottoms. Kids’ tankinis cover more of the torso; bikinis leave the midriff more open. Coordinated pieces also allow changes in color and shape. When sold as separates, different sizes can be selected for the top and bottom.
Swim Trunks and Shorts
Children’s swim shorts range from loose trunks to close-fitting, short-legged shapes. Waist design, leg length, and lining influence comfort and dressing. Baby versions worn over a separate swim diaper need enough room for the added layer.
Rash Guard Sets
Rash guard sets pair a short- or long-sleeve top with briefs or shorts. Sleeve and bottom length determine how much skin is covered. Because the pieces are separate, a bottom can be changed while the top stays on.
Modest Swimwear
Longer tops and swim pants provide more coverage for the torso and legs. Some sets include a head covering, while others do not. Openings, proportions, and fit should suit the child’s age and allow easy movement and dressing.
Swim Diapers
Swim diapers are intended for children who still need a diaper in the water. The main product forms are easy to confuse:
- Separate swim diapers: A reusable or disposable swim diaper worn alone or under compatible outer swimwear.
- Swimwear with a built-in swim diaper: A swimsuit or bottom with a dedicated swim-diaper component inside.
- Swimwear worn over a separate diaper: Regular swim trunks or a swimsuit with space underneath for a swim diaper. Swimsuits are usually equipped with easy-on/off buttons or zippers.The outer garment does not perform the diaper function.
The products may look similar from the outside, but their inner construction and purpose are not the same.
Swimwear for Specific Fit and Market Needs
These needs can be addressed across several of the swimsuit types above, including one-pieces, bikinis, and coordinated sets.
- Plus-size swimwear: Fit across the planned size range matters as much as the style itself. Torso length, cup shape, strap construction, and coverage may need to change between product types and sizes.
- Maternity swimwear: Extra room through the abdomen, flexible fabric, and adjustable details accommodate changing proportions. One-pieces and tankinis are common choices, alongside two-piece designs with suitable rises and support.
- Modest swimwear: Garment length and the combination of pieces determine the level of coverage. Choose a mix that reflects the preferences of the market you serve.
- Family matching swimwear: Shared prints, colors, or small details connect styles across age groups. A baby sunsuit, bikini, and pair of trunks can coordinate without using the same silhouette.
How to Choose Styles for Your Collection
Begin with how the swimwear will be used and what is missing from your current selection. The comparison below helps narrow the choices.
| What you need | Styles to consider | Key differences to compare |
|---|---|---|
| Top-and-bottom combinations or separate sizes | Bikini separates, tankinis, coordinated sets | Sizes available for each piece, compatible shapes, and set versus separate sales |
| More torso or hip coverage | Tankinis, swim dresses, high-waisted or skirted bottoms | Top length, waist height, skirt length, and back coverage |
| More arm or leg coverage | Long-sleeve one-pieces, rash guard sets, sunsuits, modest sets | Sleeve and bottom length, fit, and ease of movement |
| Bust shaping and support | Underwire tops or styles with internal cups and bands | Cup fit, band construction, straps, and lining; the style name alone does not establish support |
| Swimming, surfing, or relaxed beach use | Briefs and jammers for fitted swimming shapes; board shorts and rash guards for surf; trunks for relaxed wear | Intended activity, waistband, lining, fabric, and freedom of movement |
| Baby dressing and diaper changes | Accessible one-pieces, two-piece sets, swim diapers, or swimwear made to fit over them | Openings, closures, diaper space, and whether the diaper is separate or built in |
For sun-protection claims, sleeve length and covered area alone do not establish a UPF rating. Any stated rating needs relevant test support for the material or garment concerned.
Choose the core shapes first, then add styles that look or function differently. Shared colors and prints can tie the products together. You may also reuse fabric where it suits the activity, but one material will not necessarily work for every style.
Consider the work behind each design. New cup shapes, closures, or multi-piece combinations may take more development than a variation of an existing fit. The actual workload depends on the design, so a fixed complexity ranking would be misleading.
Decide whether mix-and-match flexibility is worth the additional inventory. Fixed sets are simpler to manage. Separates allow size and style combinations, but tops and bottoms may sell at different rates and leave uneven stock.
Once you have shortlisted the styles, use reference images to show the shapes and coverage you want. Samples can then help you assess fit, support, and comfort before expanding the range.
Frequently Asked Questions About Swimsuit Types
Planning Your Next Swimwear Collection
Have a few styles in mind? Share your reference images, sketches, or initial style list with UNIJOY. We can help you explore suitable options for your next swimwear collection.
