A woman wearing a one-piece swimsuit with horizontal brown and light blue stripes, standing by an outdoor swimming pool under a clear blue sky.

A woman wearing a light blue one-piece swimsuit with thin brown horizontal stripes stands by a swimming pool outdoors under a clear blue sky.

A woman wearing a light blue one-piece swimsuit with thin brown horizontal stripes stands at the edge of an outdoor swimming pool, looking down and adjusting her pose. The background shows blue pool water, lane lines, and a sunny outdoor setting.

A woman standing at a swimming pool, photographed from behind, wearing a light blue one-piece swimsuit with thin brown horizontal stripes and a crisscross back strap design.

A woman photographed from behind wearing a one-piece bikini with horizontal stripes in light blue, white, and brown, set against a clear blue sky.

A woman wearing a light blue one-piece swimsuit with thin brown stripes sits on a blue and white pool starting block beside an outdoor swimming pool on a sunny day.

A woman wearing a light blue one-piece swimsuit with brown horizontal stripes, sitting by an outdoor swimming pool.

A woman in a light blue one-piece swimsuit with thin brown horizontal stripes stands in a swimming pool, holding onto a pool ladder. The water is bright blue with visible lane lines in the background.

A seamless horizontal striped pattern featuring alternating bands of light blue, white, light pink, and dark brown.

BELLE RUBII ONE PIECE

Name: BELLE RUBII ONE PIECE
Brand: koziiswim
SKU: 770150467051
Price: 144.0 AUD
Availability: InStock

$144.00

By koziiswim

Size

Our swimwear is designed to be quite firm fitting compared to "fashion" swimwear so our sizing may feel a bit smaller than you are used to. We do suggest sizing up a size from your 'normal' size when wearing Kozii One pieces if you are in between sizes.

Female Size Guide

AUS SIZE	US SIZE	CHEST	HIPS	TORSO
Girls 6	/	58–62cm \| 22–24 in	58–63cm \| 22–24 in	42–45cm \| 16–17 in
Girls 8	/	62–67cm \| 24–26 in	63–68cm \| 24–26 in	45–49cm \| 17–19 in
Girls 10	/	67–71cm \| 26–28 in	68–73cm \| 26–28 in	49–53cm \| 19–20 in
Girls 12	26	71–73cm \| 28–28.7 in	73–78cm \| 28–30 in	53–56cm \| 20–22 in
Girls 14/Ladies 6	28	73–75cm \| 28–29 in	78–83cm \| 30–32 in	56–60cm \| 22–23 in
Ladies 8	30	80–85cm \| 31–33 in	83–88cm \| 32–34 in	60–65cm \| 23–25 in
Ladies 10	32	85–90cm \| 33–35 in	88–93cm \| 34–36 in	65–70cm \| 25–26 in
Ladies 12	34	90–95cm \| 35–37 in	93–98cm \| 36–38 in	70–75cm \| 27–29 in
Ladies 14	36	95–100cm \| 37–39 in	98–103cm \| 38–40 in	75–80cm \| 29–30 in
Ladies 16	38	100–105cm \| 39–41 in	103–108cm \| 40–42 in	80–85cm \| 31–33 in
Ladies 18	40	105–110cm \| 41–43 in	108–113cm \| 42–44 in	85–90cm \| 33–35 in
Ladies 20	42	110–115cm \| 43–45 in	113–118cm \| 44–46 in	90–95cm \| 35–37 in
Ladies 22	44	115–120cm \| 45–47 in	118–123cm \| 46–47 in	95–100cm \| 37–39 in
Ladies 24	46	120–125cm \| 47–49 in	123–128cm \| 48–53 in	100–105cm \| 39–41 in

100% CHLORINE TOUGH (CT) FABRIC — Due to the limited amount of stretch in this fabric, if you fall between sizes, we suggest selecting the larger size. Sizing up in all CHLORINE TOUGH (CT) one pieces is recommended.

Male Size Guide

SIZE	RACER	JAMMER	HIPS	WAIST
Boys 6	6	6	55cm	22"
Boys 8	8	8	60cm	24"
Boys 10	10	10	65cm	26"
Boys 12	12	12	70cm	28"
Boys 14	14	14	75cm	30"
Boys 16/Mens 14	XS	— (Racer only)	80cm	31"
Mens 16	S	XS/S	85cm	32"
Mens 18	M	S/M	90cm	34"
Mens 20	L	M/L	100cm	36"
Mens 22	XL	L/XL	105cm	38"
Mens 24	XXL	XL/XXL	110cm	40"

100% CHLORINE TOUGH (CT) FABRIC — Due to the limited amount of stretch in this fabric, if you fall between sizes, we suggest selecting the larger size. Sizing up in all CHLORINE TOUGH (CT) one pieces is recommended.

Active swimwear garments need to be a perfect fit in order for the wearer to gain the most out of their swimwear.

The "perfect fit" is a very individual thing as everyone has different body shapes and sizes and different requirements as to how they like to wear their swimwear. Some like to wear their swimwear 'really tight' while others like to go for more comfort.

In our girls and women's swimwear please read the product and fabric description for the styles as not all styles will suit all body shapes and sizes.

We tend to use all our styles on a regular basis so if you find a style you like then you can always look for garments in this same style to purchase when we release them out in the different printed fabrics.

Sizing can vary considerably for one pieces, if you are long in the body i.e. from neck to crutch then you will need a larger size to accommodate for the length of your body.

PLEASE NOTE: THE BELOW IS A GUIDE ONLY WHICH IS BASED ON OUR SWIMWEAR. MEASUREMENTS/SIZING WILL VARY SLIGHTLY WITH DIFFERENT FABRICS AND STYLES.

Fit reference: Charlie Ladies 8, Lily Ladies 10, Kristy Ladies 12, Kalani Ladies 8

Quantity

Find your fit with our Size Guide. Shop confidently with easy returns.

Say hello to Belle - a fun and playful take on the classic stripe. Featuring soft blue, warm chocolate brown and crisp neutral tones, this colourful combination brings a fresh and cheerful feel to your swimwear wardrobe. The mix of stripes creates a little rhythm and movement, while the unexpected colour pairing keeps the print feeling modern. Easy to wear but far from ordinary, Belle is a feel-good print made for sunny days, salty adventures and making a splash.

The Rubii One Piece design is based on the much-loved Elite-X One Piece, it features that sleek open back and wrap-around torso for a fit that moves with you. We’ve added playful new strap configurations to give you even more ways to wear Kozii your way.

Designed in-house at Tweed Heads, printed and made in Australia, and exclusive to Kozii. Worn by Diving Australia and trusted by swimmers who train hard. Locked-in fit, nothing shifting, session after session.

✔ Exclusive Belle striped print

✔ Signature Rubii cut: open back, thin binding, secure locked-in fit

✔ High-performance GRS Recycled fabric, built to outlast the season

✔ Made for training, competition, and your daily swim

This is performance swimwear, designed to fit like a second skin. It will feel firmer than fashion swimwear by design. If you're between sizes or prefer a more relaxed fit, size up.

More details

Our new Rubii One Piece has been created in collaboration with our strong and inspiring Team Kozii athletes!

Designed based on the much-loved Elite-X One Piece, it features that sleek open back and wrap-around torso for a fit that moves with you. We’ve added playful new strap configurations to give you even more ways to wear Kozii your way. More choice, more fun, in Kozii!

Kozii swimwear is proudly designed and made in Australia, blending high-performance fabrics with style and durability. Trusted by competitive swimmers and Diving Australia athletes, every piece is tested for comfort, support, and longevity. Our sustainable approach, including recycled fabrics, ensures your swimwear performs in training, competition, and everyday pool or beach sessions.

True-to-size performance fit
Open-back design allows flexibility and movement
Wide straps for secure, comfortable support

Model SizeMaya is wearing a Ladies 8Height: 170cm | Chest: 79cm | Waist: 62cm | Hips: 92cm

Not sure which size to choose? Check out our Size Guide to find your best fit.

GRS-certified recycled fabric (80% recycled polyester, 20% spandex)
Muscular compression with excellent durability
Chlorine-resistant for long-lasting performance
Quick-drying, soft, and breathable
Maintains shape and colour despite repeated pool and sun exposure

To keep your swimwear performing at its best:

Rinse thoroughly with fresh water after each use
Do not leave rolled up in a damp in a towel
Hand wash gently with mild detergent to remove chlorine
Avoid rough surfaces that may snag fabric
Follow all care label instructions

With proper care, your swimsuit will maintain its shape, colour, and performance, keeping it looking and feeling great season after season.

AUS SIZE	US SIZE	CHEST	HIPS	TORSO
Girls 6	/	58–62cm \| 22–24 in	58–63cm \| 22–24 in	42–45cm \| 16–17 in
Girls 8	/	62–67cm \| 24–26 in	63–68cm \| 24–26 in	45–49cm \| 17–19 in
Girls 10	/	67–71cm \| 26–28 in	68–73cm \| 26–28 in	49–53cm \| 19–20 in
Girls 12	26	71–73cm \| 28–28.7 in	73–78cm \| 28–30 in	53–56cm \| 20–22 in
Girls 14/Ladies 6	28	73–75cm \| 28–29 in	78–83cm \| 30–32 in	56–60cm \| 22–23 in
Ladies 8	30	80–85cm \| 31–33 in	83–88cm \| 32–34 in	60–65cm \| 23–25 in
Ladies 10	32	85–90cm \| 33–35 in	88–93cm \| 34–36 in	65–70cm \| 25–26 in
Ladies 12	34	90–95cm \| 35–37 in	93–98cm \| 36–38 in	70–75cm \| 27–29 in
Ladies 14	36	95–100cm \| 37–39 in	98–103cm \| 38–40 in	75–80cm \| 29–30 in
Ladies 16	38	100–105cm \| 39–41 in	103–108cm \| 40–42 in	80–85cm \| 31–33 in
Ladies 18	40	105–110cm \| 41–43 in	108–113cm \| 42–44 in	85–90cm \| 33–35 in
Ladies 20	42	110–115cm \| 43–45 in	113–118cm \| 44–46 in	90–95cm \| 35–37 in
Ladies 22	44	115–120cm \| 45–47 in	118–123cm \| 46–47 in	95–100cm \| 37–39 in
Ladies 24	46	120–125cm \| 47–49 in	123–128cm \| 48–53 in	100–105cm \| 39–41 in

BELLE RUBII ONE PIECE

Female Size Guide

Male Size Guide

Customer Reviews

Recently Viewed

100% Australian Made

RECYCLED FABRICS

Afterpay

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INFORMATION

CUSTOMER CARE

We acknowledge and pay respects to the Bundjalung people, the traditional custodians of the land on which we now operate at Tweed Heads and recognise their continuing connection to land, waters, and culture. We pay our respects to the first Australians and their elders past, present and emerging.

Currency

BELLE RUBII ONE PIECE

Female Size Guide

Male Size Guide

Customer Reviews

Recently Viewed

100% Australian Made

RECYCLED FABRICS

Afterpay

We acknowledge and pay respects to the Bundjalung people, the traditional custodians of the land on which we now operate at Tweed Heads and recognise their continuing connection to land, waters, and culture. We pay our respects to the first Australians and their elders past, present and emerging.