High Waisted Bikini Bottoms | The Sumba

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'The perfect high rise with waist band, adds extra tummy support.'

Size: XXS

Color: Celestial Blue

Only 7 left!

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  • Silky soft, high waisted bikini bottoms made with premium Italian fabric.
  • Designed to last twice as long as your regular high waisted bikini bottoms, made with durable sustainable fabric - Better for you and better for the planet!
  • Keep your skin protected with UPF 50+ protection, provided by luxurious, eco friendly fabric.

For ultimate comfort with seamless edges, our high waisted bikini bottoms will quickly make these your new go-to. Cut to show off those cute cheeks, the mesh detailing adds style without sacrificing comfort. 

Booty-Friendly Bikini Bottoms.  Spending all day in bikini bottoms can feel like a chore, until you try on our buttery soft, high waisted bikini bottoms. We design, cut, and sew, all our bikini bottoms for ultimate comfort and function, from the smooth strong seams to the sustainable fabric.

The perfect bikinis for surfing with a flattering high rise bikini, they pair with the Sumba Cropped Rash Guard, and  can mix & match with any of our two piece tops. 

Read more about ECONYL, the sustainable fabric we use in all our swimwear.

Twelve month Warranty from date of purchase.

Head to our to find your perfect fit.

Model in video is a size 10 AU and is wearing size small.

Firm and supportive cut, if buying the Midnight, go up a size. If you prefer a more relaxed feel, go up a size.

Sustainable style; made with Econyl - sustainable UPF 50+ regenerated nylon. Protects you from the suns harmful rays.

Durable Design; crafted with high-quality fabric designed to endure. Will last twice as long as your regular bikini.

Seamless edges plus soft, luxurious Italian fabric, comfortable enough for all-day adventures.

Double-Lined, for comfort and coverage.

Cheeky cut; showing off some cheek for sexy yet dependable coverage.

Just the right high rise; not too high, but just right.


Worldwide shipping from Bali & Australia. Free Shipping for orders $250+.

Regular International parcels take approximately 3 weeks.

Express shipping option available at checkout for $ AUD.

Please read more of our Shipping Policy here.


We accept exchanges or returns for change of mind, as long as it is processed within 14 days.

Please follow instructions on our Returns page.


We stand by the quality of our swimsuits, they are tailor made with high quality Italian fabric.

We offer a 12 month warranty from date of purchase, shall the make, material or hardware malfunction.

Read more about our warranty here.

To keep your swimwear happy and healthy, please follow our general care guidelines:

Our suits are happiest when hand-washed separately in cool water so the colours do not bleed. Please avoid traditional washers and abrasive materials like velcro and bleach. Do not leave wet swimsuit in a bag. Air dry in a shady spot.

Have a question? You can reach us below or on live chat.


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Recycled Materials
UPF 50+ Protection
Luxuriously Soft Fabric
Made With Love

Customer Reviews

Based on 9 reviews
C.M. (Évry, FR)
My fav bikini bottom

It was my first piece from OSB and now with the women rash guard it is my favorite swimwear.
Very flattering fit and confortable. I love it!

M.B. (Antipolo City, PH)
my favorite bikini bottom

It's even better than in the photos ! Absolutely love wearing it, as for freediving as for going to the beach. Comfy and flattering at the same time !

Gorgeous design & so flattering!

Comfy, flattering, the size is spot on! I just wore these surfing with the matching top & they’re perfect!!

Customer (Melbourne, AU)
Great shape fit and cut

Absolutely love these bottoms … they are a such a great fit and cut. The high waist it so flattering and looks great with any other bather top … there is something about a high waist bottom that is so stylish yet practical … LOVE!!!!

My number one

It was my first two-piece from OSB & I love it like the first day! Fits perfectly and nothing slips! A dream.

Perfect two piece cut

Our two piece bikinis are made with a luxurious sustainable buttery soft fabric. 
They are the perfect intersection of sporty and fashionable.  With a comfortable seamless design, both functional and flattering and a tailored feminine design that is suitable for leisure or athletic activities.

Designed for comfort

We’ve designed our swimsuits for comfort right down to the smallest detail. The luxuriously soft fabric, double lined, with innovative cupless support and smooth seams will hold you in and support you, with all your water activities.

Sustainable Swim

We value slow fashion over fast with a focus on sustainable fabrics and ethical production. Crafted from regenerated nylon that is designed to last twice as long as your regular swimsuit. Our swimwear is designed & made in Bali with love, with 10% of each sale donated to those in need through our Giving Back initiative.


All of our swimsuits are double lined and a firm fit so you don't need padding for support.

The sumatra high waisted bikini bottom provides the most coverage on your bottom. The sumba high rise bikini is the next best for bottom coverage.

The Bali Bikini and Banyak bikini top is a smaller cut, designed to be firm so it doesn't move when being active. If you prefer a more relaxed fee, size up and if in between go up two sizes.

All of our snow white seamless bikinis, crop top bikinis and crop rash guards are lined with beige econyl sustainable fabric to prevent them from going transparent when wet.

The Sumatra and the Sumba bikini provide the most coverage and support for your tummy.

Yes all of our bikinis are made with a seamless stitch so they don't dig in to your skin.