30 One-Piece Patterns for Swimwear Sewing

April 23, 2022

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Hello! We are starting to experience warmer weather and in anticipation of getting some pool/beach time I’ve been making swim pieces for myself and others. Since I am researching and looking into swim patterns anyway, I thought I would compile my swim pattern findings into a list or two.

This list features 30 one-piece sewing patterns. Take note: a number of these one-piece patterns are part of patterns that offer a bikini or two piece option as well. I’ve made mention of this where applicable. All patterns listed here are in PDF format.

If you are just dipping your toes in swimwear sewing, I hope this list is a good starting point for you! If you are looking for a specific swim style or silhouette, I also hope this list helps you narrow down your search.

Note: This is by no means a comprehensive list of all the existing one-piece swim patterns out there. Consider this list a starting point for exploring one-piece pattern options currently available. If you have a favorite one-piece swim pattern to recommend that’s not on the list, feel free to drop a comment below!

Abigail Swimsuit by Ohhh Lulu Sews

As per the pattern designer:

The Abigail Pattern creates a classic, vintage-style, one-piece swimsuit. It has a sexy, deep v-neckline, boy-cut legs, cutout back and halter straps.

Sizes Available: XS-XL

You can purchase the Abigail Swimsuit Pattern here.

Alexandria Swimsuit by Made for Mermaids

As per the pattern company:

The Alexandria swimsuit is a modern take on a classic crossover one piece swimsuit. Keep it simple with the faux wrap option, or make it trendy with the tie wrap option! Both styles include an optional flounce, which is both flirty and fun. Choose from halter straps, straight back sewn-in straps, or crossover sewn-in straps. Includes a fully lined suit and the option to add support with sewn-in cups and an elastic shelf bra.

Sizes Available: 30-51″ Bust, 33-54″ Hip

You can purchase the Alexandria Swimsuit Pattern here.

Amnésia One-Piece by Charlotte Jaubert

The Amnésia One-Piece Swimsuit features a drop in the front and criss cross panels above the chest area. The pattern can also be made as a bodysuit with suitable fabrics.

Sizes Available: 34-52

Note: This pattern is in French.

You can purchase the Amnésia One-Piece Pattern here.

Andromeda Surf Suit by Eureka Patterns

The Andromeda Surf Suit features a collar, zipper, long sleeves, panels for colorblocking, and high and low hip options. Pattern can also be used as a rash guard.

Sizes Available: 0-30

You can purchase the Andromeda Surf Suit Pattern here.

Ava One-Piece by Gigi Patterns

The Ava One-Piece is a sexy cutout style featuring tie closures.

Sizes Available: XS-5XL

You can purchase the Ava One-Piece Pattern here.

There is a video sew-along for the Ava One-piece available here.

Azure Swimsuit by Designer Stitch

The Azure Swimsuit features a right side overlay designed to be cut in a contrasting fabric. You have the option of a boy leg height, a high cut leg height or a cheeky high cup leg height for the bottom portion of the swimsuit.

Note: This pattern comes with the option of making the pattern as separates as well.

Sizes Available: US 2-26 (Cup Size – B, C, D, DD)

You can purchase the Azure Swimsuit Pattern here.

Camille One-Piece by Sirena Patterns

As per the pattern designer:

Misses’ one-piece swimsuit: View A: Halter top, deep plunge neckline and high waisted, medium coverage high waisted bottom. Fully lined. View B: Halter top, deep plunge neckline and high waisted, medium coverage high waisted bottom with draped sides with front knot. Fully lined.

Sizes Available: XS-XL

You can purchase the Camille One-Piece Pattern here.

Clara One-Piece by Swimstyle Patterns

The Clara One Piece features a deep vee neckline. You have the option of a high or low back.

Sizes Available: XS-3XL

You can purchase the Clara One-Piece Pattern here.

Classic Swimsuit by Rebecca Page

As per the pattern company: he Classic Swimsuit is a timeless one-piece swimsuit with shaped cups, full lining, and many additional support options.

Sizes Available: XXS-5XL (Cups AA-M)

You can purchase the Classic Swimsuit Pattern here.

Cottesloe Swimsuit by Megan Nielsen Patterns

The Cottesloe Swimsuit Pattern offers two one-piece options: View A has a low scoop back, a shelf bra, and ties at the back. View B is a classic style with a high scoop back.

Note: This pattern comes with two bikini top and bottom options as well.

Sizes Available: 0-20, 14-30 (Curve)

You can purchase the Cottesloe Swimsuit Sewing Pattern here.

You can purchase the Cottesloe Curve Swimsuit Sewing Pattern here.

Cygne Swimsuit by Hari Ito Lingerie

As per the pattern designer:

The Cygne Swimsuit includes a two-piece cup (available in three double cup sizes), five different views on the front, with an elegant low-cut back with two options. A seam on the back guarantees a beautiful fit. The leg height is medium-high, and the cups can be lined with preformed or cut-and-sew foam cups.

Sizes Available: EU 32-52 (B-G Cups)

You can purchase the Cygne Swimsuit Pattern here.

Ella’s Retro Ruched Swimsuit by CKC Patterns

As per the pattern designer:

Dive into the past with Ella’s Retro Ruched Swimsuit. This modest one piece has it all! Grab your sunglasses and hit the beach in this stylish and fun swimsuit. Ella’s features faux piping, a cute halter top tie, a retro collar option and a low cut bottom to fully cover your backside. It includes instruction on customizing the length and cup size to fit you perfectly and adding swim cups for extra support.

Sizes Available: XXS-3X

You can purchase the Ella’s Retro Ruched Swimsuit Pattern here.

Fit to Be Tied Swimsuit by Rad Patterns

The Fit To Be Tied One-Piece have the option for a full coverage back or halter style straps. Includes multiple cup size options and functional ties to help achieve the perfect fit.

Note: The pattern comes with bikini tops and bikini bottom options as well.

Sizes Available: XXS-4X

You can purchase the Fit to Be Tied Swimsuit Pattern here.

Ibiza Swimsuit by Laeyla Jeyne Patterns

The Ibiza Swimsuit is a stylish one shoulder monokini with high cut legs. This is also the pattern in the featured image of this post.

Note: This pattern comes with a bikini top and bikini bottom with two rise options as well.

Sizes Available: 00-30 (Cups A-E)

You can purchase the Ibiza Swimsuit Pattern here.

Into the Blue Monokini by Striped Swallow Designs

As per the pattern designer:

Make a splash this summer with Striped Swallow Designs’ first swimsuit pattern, Into the Blue! This beautiful monokini is attached at the sides, and offers both an open and full back, along with charming high-waisted bottoms and a sweet ruched bodice. Give the bodice the finishing touch with a simple band, or a cute knotted front!

Sizes Available: XS-XXXL

You can purchase the Into the Blue Monokini Pattern here.

Ipswich Swimsuit by Cashmerette

The Ipswich One-Piece Swimsuit is designed with color blocking in mind with its wide neck band, side panels and waistband. The style is designed to be supportive with the option of an underwired foam bra and boning.

Note: This pattern comes with a two-piece option as well.

Sizes Available: 12-32

You can purchase the Ipswich Swimsuit Pattern here.

Life Swimsuit by Bikini Design Club

As per the pattern designer:

Designed to the modern women who enjoy water activities ant want to protect the skin from sunburns. All this, but still looking sexy. Side darts for a perfect fit, center back seam on the bottom to follow your body curves, low hip and good back bottom coverage are the perfect balance.

Sizes Available: 12-24

You can purchase the Life Swimsuit Pattern here.

Mairin Swimsuit by Sew a Little Seam

Is anyone else blown away by the myriad of options and the level of customization this pattern offers?

Mairin Swimsuit with Shoulder Bows that I made.

I own this pattern and I can see a lot of the included one-piece styles will be great jumping off points for various pattern hacks once you nail the fit. So far I’ve made the one-piece view with wide shoulder straps, mid scoop front, mid scoop back and mid leg cut.

Note: This pattern includes a lot of mix and match two-piece options as well.

Sizes Available: 32″-48″ Bust, 36-52″ Hip

You can purchase the Mairin Swimsuit Pattern here.

Maree Swimsuit by Measure Twice Cut Once

As per the pattern designer:

Maree is a classic 70’s style halter swimsuit that offers a full coverage bottom and a gathered top. Perfect for laid back days by secluded bays.

Sizes Available: 6-18 (Australian Sizing)

You can purchase the Maree Swimsuit Pattern here.

Nautilus Swimsuit by Paprika Patterns

As per the pattern designer:

The Nautilus Swimsuit has an elegant twist center front, like the shell of its namesake cephalopod. The pattern is fully lined and comes with 4 different cup size options (AA cup, A/B cup, C/D cup, or DD+ cup) to make fitting a breeze.

Note: This pattern comes with two bikini set variations as well.

Sizes Available: 0-30 (Cup sizes AA, A/B, C/D and E/F)

You can purchase the Nautilus Swimsuit Pattern here.

The Riri Swimsuit by Mimi G Style

The Riri Swimsuit is a low cut high waisted style one-piece swimsuit.

Sizes Available: XXS-2XL

You can purchase The Riri Swimsuit Pattern here.

Rhonda Swimsuit by 5 out of 4 Patterns

As per the pattern company:

Rhonda is a beautifully seamed one-piece swimsuit with so many lovely colorblocking opportunities. This suit includes a regular or FBA (full bust adjustment) front bodice with cup sizing A-F and a corresponding built-in shelf bra (removable swim cups optional!). You can choose from a regular or ruched front bottom panel. Rhonda features a square neckline and either a regular higher cut leg or a lower retro cut leg.

Sizes Available: XXS-5XL

You can purchase the Rhonda Swimsuit Pattern here.

Salida Swimsuit by Kimberly Payne of Straight Stitch Designs

As per Sew Daily:

Summer meet the Salida Swimsuit! With cool color blocking and unique one-strap design, this one-piece is classic yet stylish and distinct… and also comfortable! The single strap design makes for easy customization depending on your torso length. Recommended fabrics include any stretch swimwear fabrics. Designed by Kimberly Payne of Straight Stitch Designs

Sizes Available: 0-34

You can purchase the Salida Swimsuit Pattern here.

Seabright Swimmer by Friday Pattern Company

As per the pattern designer:

The Seabright Swimmer is a one piece swimsuit pattern that can be made with or without sleeves. It features a plunging neckline with gathering at the shoulder and waist. The instructions include a tutorial for adding a lace up neckline closure for added modesty. The sleeves let you look and feel glam while providing a bit of added sun protection!

Sizes Available: XS-4X

You can purchase the Seabright Swimmer Pattern here.

Sophie Swimsuit by Closet Core Patterns

The Sophie One-Piece Swimsuit features a 3-piece balconette cup and curved seam lines. You have the option of adding underwires and sewing foam cups for extra support.

Note: This pattern comes with a two-piece option as well.

Sizes Available: 0-20

You can purchase the Sophie Swimsuit Pattern here.

Splash Swimsuit Pattern by Lily Sage and Co Designs

As per the pattern company:

The Splash Swimsuit in VIEW A is a one-piece with high-waisted pants, tapered midriff, and a slightly gathered front bodice. The straps tie securely at the back and behind the neck in a halter style.

Note: The pattern comes with a bikini top and bottom option as well.

Sizes Available: 6-18

You can purchase the Splash Swimsuit Pattern here.

Take the Plunge Swimsuit by Patterns for Pirates

As per the pattern company:

This intermediate knit pattern is a traditional, tight fitting one piece swimsuit with tons of options! It is fully lined and comes with directions to add bust support (sew in swim cups, power mesh and under bust elastic). All seams are enclosed and edges finished with elastic for a secure, traditional swimsuit fit and feel.

Sizes Available: XXS-3X

You can purchase the Take the Plunge Swimsuit Pattern here.

Violet One Piece by Edgewater Ave

As per the pattern designer:

The Violet One Piece has “pool party” written all over it, and an understated sexy look that commands attention. The wrap around bust pieces create such a beautiful silhouette, and with 2 coverage options to choose from versatility lives in this pattern too!

I LOVE this pattern design–I’ve made one in a Lilac Orchid Swim Lycra so far and I plans to make at least one more once I tweak the pattern.

Sizes Available: XS-XXL

You can purchase the Violet One Piece Pattern here.

There is a video tutorial on sewing up the Violet One Piece here.

Water Faery Retro One-Piece by Stitch Upon a Time

As per the pattern designer:

This women’s one-piece swimsuit sewing pattern features two bodice styles and four body styles.

There are two bodice styles, Solid and Twisted. The twisted bodice has an adorable triangle cut-out below the bust with a unique twist at the top.

The four body styles include: Solid, Ruched, Short Skirt, and Long Skirt.

The Solid Body has one piece for the front and one for the back and is fully lined with enclosed seams at the legs and crotch.

The Ruched Body has three outer pieces for the front and the same for the back. It is fully lined without ruching for comfort.

Both skirt options begin at the natural waist with a full circle skirt. The long skirt falls just above the knee and the short skirt to the full hip.

Sizes Available: XXS-4X

You can purchase the Water Faery Retro One-Piece Pattern here.

Women’s Swimsuit by Make it Yours The Label

This swimsuit pattern features a deep back neckline, adjustable straps, and darts for shaping.

Sizes Available: 34-44

You can purchase the Women’s Swimsuit Pattern by Make it Yours The Label here.

Final Words

There you have it! 30 one-piece swim patterns to help kick start your swimwear sewing plans.

Looking for additional bikini tops, bikini bottoms, or bikini set patterns? Check out the 30 Bikini Patterns for Swimwear Sewing roundup here.

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