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Sunday Siblings is designed on the Mornington Peninsula, Victoria, by three mamas setting out to make cool, fun and comfortable clothing for our little loves. Sunday Siblings is creating high quality, durable and stylish pieces with the intention to be passed down to other babes. Whether that is to siblings or to friends.

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11 products

A child in a blue shirt and SUNDAY SIBLINGS' Dusty Star Pants, featuring an elastic waistband, balances on a fallen tree trunk. They're wearing checkered shoes and stretching their arms for balance against a backdrop of trees and blurred outdoor seating.A child in a blue shirt and SUNDAY SIBLINGS' Dusty Star Pants, featuring an elastic waistband, climbs a tree branch. The checkered sneakers add flair to their adventurous spirit against a serene backdrop of greenery and a blurred pathway.
SUNDAY SIBLINGS
Sunday Siblings ~ Dusty Star Pants Sale price$59.00
Sold outSunday Siblings ~ Mackenzie Dress & Bloomers PinkSunday Siblings ~ Mackenzie Dress & Bloomers Pink
SUNDAY SIBLINGS
Sunday Siblings ~ Mackenzie Dress & Bloomers Pink Sale price$69.00
Sunday Siblings ~ Sonny Romper Blue - Size NB-1Sunday Siblings ~ Sonny Romper Blue - Size NB-1
SUNDAY SIBLINGS
Sunday Siblings ~ Sonny Romper Blue - Size NB-1 Sale price$54.00
The Sunday Siblings Il Sole Tee in purple/cream, known for its oversized fit and soft cotton fabric, is taped to a light-colored wall using blue tape. It features graphic designs and the words "mornington peninsula" and "sunlay.A Sunday Siblings ~ Il Sole Tee in purple/cream, crafted from soft cotton, is taped to a white wall with two pieces of blue tape at the shoulders, displaying the oversized back.
SUNDAY SIBLINGS
Sunday Siblings ~ Il Sole Tee Purple/Cream Sale price$49.00
Introducing the Sunday Siblings Il Sole Tee: a pink/red children's T-shirt made from 100% cotton, featuring "Sun" in bold orange and "sunday things" in smaller print. Its oversized fit adds a trendy touch as it hangs on a white wall with blue tape.The Sunday Siblings ~ Il Sole Tee Pink/Red, an oversized piece by SUNDAY SIBLINGS, is affixed to a light gray wall with blue tape on its shoulders. Displayed backward, it highlights its 100% cotton material beautifully.
SUNDAY SIBLINGS
Sunday Siblings ~ Il Sole Tee Pink/Red Sale price$49.00
A curly-haired child in a purple shirt and SUNDAY SIBLINGS' Sunday Siblings ~ Kiddo Shorts Purple walks a curved path. Nearby, another child in a blue shirt wears similar French terry cotton shorts. The serene backdrop includes trees and people sitting.Two curly-haired kids embrace outdoors, one in purple and the other in blue, wearing matching Sunday Siblings Kiddo Shorts Purple with star prints. A red object and greenery can be seen in the sunny background.
SUNDAY SIBLINGS
Sunday Siblings ~ Kiddo Shorts Purple Sale price$49.00
The Sunday Siblings ~ Il Sole Tee Blue/Yellow, a vibrant short-sleeved cotton shirt taped on a white wall, features an oversized fit for comfort, with "SÜ" and "Sunday Morning Brings" stylized graphics.The Sunday Siblings Il Sole Tee Blue/Yellow, made from soft cotton fabric, is taped with blue tape to a vertically paneled white wall. The simple yet elegant design of this t-shirt stands out against the grooved backdrop.
SUNDAY SIBLINGS
Sunday Siblings ~ Il Sole Tee Blue/Yellow Sale price$49.00
A young, blonde-haired child sits on a white picnic bench, enjoying a lollipop. They're wearing a blue shirt with a design and stylish Sunday Siblings Kiddo Shorts Blue made from French terry cotton, featuring an elastic waistband. A small disco ball nearby adds to the relaxed outdoor vibe.A young child with blonde hair sits on a white bench, wearing a blue t-shirt and Sunday Siblings ~ Kiddo Shorts Blue with an elastic waistband. The child holds a lollipop and gazes at the camera, with a shiny disco ball glimmering behind them.
SUNDAY SIBLINGS
Sunday Siblings ~ Kiddo Shorts Blue Sale price$49.00
A wooden hanger displays the PRE-ORDER Minnie Singlet, a white sleeveless tank top by SUNDAY SIBLINGS, made from ribbed cotton fabric with "SUNDAY SIBLINGS" printed in red, against a plain white wall.A cheerful toddler with blonde pigtails is wearing the PRE-ORDER Minnie Singlet by SUNDAY SIBLINGS, a white sleeveless top made of ribbed cotton fabric. She pairs it with pink shorts adorned with star details while holding a lollipop and standing outdoors amidst greenery.
SUNDAY SIBLINGS
Minnie Singlet - Size 4-5 Sale price$32.00 Regular price$45.00
A sleeveless Nonno Vest Blue from SUNDAY SIBLINGS is displayed on a wooden hanger against a plain background. Made from 100% cotton, this cream-colored vest offers a touch of grandad style with its bright blue accents on the collar, armholes, and hem. The minimalist setup emphasizes the vest's design and contrasting colors.A toddler with short blonde hair is in a sunlit room, holding small objects. They are dressed in a beige Nonno Vest Blue from SUNDAY SIBLINGS featuring blue trim, paired with pink pants, giving off grandad vibes. A disco ball sits on the floor, and a red sofa adds warmth to the scene. The outfit is crafted from 100% cotton for comfort.
SUNDAY SIBLINGS
Nonno Vest Blue - Size 5-6 Sale price$38.00 Regular price$54.00
The Nonno Vest Butter Yellow by SUNDAY SIBLINGS, featuring a sleeveless design crafted from 100% cotton with beige trim, hangs elegantly on a wooden hanger against a plain white wall.A child with pigtails, in a yellow sleeveless top and SUNDAY SIBLINGS Ninch Pants Pink Stars (Size 5-6) with an elastic waistband, walks down a metal outdoor staircase on a sunny day, holding the railing amid visible greenery.
SUNDAY SIBLINGS
Nonno Vest Butter Yellow Sale price$54.00

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