Size 18 Women's Swimwear

  • In stock
186 products

Chlorine Resistant Navy & White Dots Underwire One Piece

    $149.95
Black curvy tie front one piece with sleeve and stomach ruching

Black Short Sleeve Tie Front One Piece

    $109.95
Sale
Ghost Mannequin image of leopard high neck zip up one piece with frill sleeve

Leopard Sustainable Frill Sleeve One Piece

    Sale price $99.95 Regular price $139.95
Polkadots Navy and White Frill Sleeve One Piece Swimwear

Navy & White Dots Frill Sleeve One Piece

    $129.95
size 16 women standing on a beach wearing supportive underwire tankini top in textured black and white fabric

Acapulco Underwire Tankini Top

    $134.95
Sale
model wearing black floral high waisted swim pant with matching off the shoulder bikini top

Frenchy Black High Waist Bikini Bottoms

    Sale price $29.95 Regular price $59.95
Brunette plus size model wears underwire one piece in textured fabric

Honey Comb Black Underwire One Piece

    $139.95
navy and white dots retro pant

Navy & White Dots Ruched Skirted Bikini Bottoms

    $79.95
navy and white dots crop wrap top

Navy & White Dots Crop Wrap Bikini Top

    $89.95
model wearing black and white panelled zip front one piece at the pool

Acapulco Cap Sleeve One Piece

    $149.95
blonde model standing against wall wearing a black floral v neck one piece swimsuit

Frenchy Black V Neck One Piece

    $134.95
Sale
leopard bikini wrap top for a big bust

Leopard Sustainable Wrap Crop Bikini Top

    Sale price $44.95 Regular price $89.95
Plus Size Tankini Top

Black 3 Tier Tankini Top

    $99.95
Sale
model wearing leopard print long sleeve one piece with front zip

Leopard Sustainable Long Sleeve One Piece

    Sale price $109.95 Regular price $139.95
black high waisted swim skirt

Black Skater Swim Skirt

    $54.95
Navy and white spotted one piece in vintage style. The swimsuit has thick white straps

Navy & White Dots Vintage Skirted One Piece

    $129.95
Brunette model wears plain black long sleeve rash vest with full zip front

Plain Black Long Sleeve Rash Vest

    $109.95
Sale
blonde plus size women wearing pink boho square neck bikini top

Amalfi Pink Square Neck Bikini Top

    Sale price $49.95 Regular price $99.95
Sale
Leopard High Neck Mastectomy One Piece

Leopard Sustainable Sleeveless Zip Front One Piece

    Sale price $99.95 Regular price $129.95
Plain Black High Waisted Pant Bottom

Plain Black High Waist Bikini Bottoms

    $59.95
Sale
Ghost mannequin wearing olive green textured one piece swimsuit

Acapulco Fresh Square Neck One Piece

    Sale price $99.95 Regular price $154.95
blonde size 18 women is wearing a short sleeve black rashvest with a functional front zip

Plain Black Short Sleeve Rash Vest

    $99.95
Honey Comb Black | Tankini Top Underwire

Honey Comb Black Underwire Tankini Top

    $119.95
model wearing black and gold floral 3 tier one piece on beach

Frenchy Black 3 Tier One Piece

    $144.95
Blonde model wearing black with white accent swimsuit on boat

Acapulco Underwire One Piece

    $149.95
black plus size underwire one piece

Black Scooped Underwire One Piece

    $109.95
model wearing a navy blue high waisted swimming pant made in chlorine resistant fabric

Chlorine Resistant Navy High Waist Bikini Bottoms

    $64.95
brunette model wearing navy high waisted swim bottoms with matching dotty tankini

Navy High Waist Bikini Bottoms

    $49.95
Ghost mannequin navy long sleeve rash vest

Chlorine Resistant Plain Navy Long Sleeve Rash Vest

    $119.95
ghost mannequin of navy and white polkadot retro boyleg style on piece with white straps and bow front detail

Navy & White Dots Boyleg One Piece With Bow

    $119.95
Navy and White Dots | Cute Plus Size Bikini Bottom

Navy & White Dots Tie Side Bikini Bottoms

    $44.95
Sale
leopard plus size bikini

Leopard Sustainable Two Way Bikini Top

    Sale price $49.95 Regular price $99.95
Sale
Retro Check Tie Side Swim Pant Bottom

Retro Check Tie Side Bikini Bottoms

    Sale price $10.00 Regular price $44.00
Sale
blonde plus size women wearing pink frill bikini pant with a square neckline bikini top

Amalfi Pink Frill Bikini Bottoms

    Sale price $34.95 Regular price $69.95
Sale
retro floral tied swim bottom

Retro Floral Tie Side Bikini Bottoms

    Sale price $10.00 Regular price $49.95
Sale
model wearing baby blue lace up swimsuit on beach

Provence Blue Lace Up One Piece

    Sale price $59.95 Regular price $119.95
Sale
brunette model in front of a pool wearing aqua blue print mid rise pant bottom

Whitehaven Side Ruched Mid Bikini Bottoms

    Sale price $20.00 Regular price $69.95
model standing in front of a pool wearing a black above knee boardshort with tie front detail

Plain Black Luxe Sport Stretch Board Shorts

    $79.95
Sale
Blonde model wearing white floral wrap bikini top and matching high waisted pant

Bora Bora White Wrap Crop Bikini Top

    Sale price $59.95 Regular price $89.95
Blonde model wearing a black crossover front one piece swimsuit

Black Chlorine Resistant Crossover One Piece

    $134.95

Size 18 Swimwear

Size 18 is one of our most popular sizes here at Curvy Swimwear. With this in mind we have created a collection of swimwear in size 18 to suit every shape and satisfy every need. Our size 18 collection includes everything you could possibly want in your swim wardrobe from bikini separates to one pieces, rashies and swim dresses. Browse our range and discover your new favourite swimsuit from one of our fabulous Australian brands. 

Shop by cup size or style, colour or price, and narrow your selection down to the perfect swimsuit for you. If you need help choosing, we are available via our online chat or email to answer any questions you have about style, size, or suitability. Our goal is to make your online shopping a breeze and for you to find a swimsuit that gives you all the confidence you need to hit the beach this summer. 

Size 18 One Piece Swimwear

Here at Curvy Swimwear, one piece swimsuits are our specialty. We have chosen the best one piece swimsuits from our favourite Australian brands to give you the best options in size 18 swimwear. 

You'll find fabulous one piece swimsuits in size 18 to suit your shape as well as your needs. Don't want strap marks? Our bandeau one pieces will ensure a tanline free summer. Need extra bust support? An underwire one piece might be just what you need. Spending long hours in the pool? A chlorine resistant one piece with sleeves will give you lasting protection. Whatever you need, you'll find it in our size 18 one piece swimsuit collection. 

Size 18 Swimwear Australia 

Shop easily online for size 18 swimwear in Australia and internationally. Curvy Swimwear offers excellent customer service, fast delivery, and the best range of plus size swimwear in Australia and New Zealand. 

Based on the beautiful Gold Coast, we know a thing or two about swimwear and ensure your time online with us is easy to navigate and a pleasurable experience. 



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