Onesies, costumes, party supplies and gifts – find the right range in one click.
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We're Onesie Store AU – because life's too short for boring pyjamas
Affordable onesies, kigurumi & costumes for kids and adults across Australia
We started Onesie Store AU because we couldn't find onesies and costumes in Australia that were both high quality and affordable. The big brands wanted $80+ for a onesie – we knew that was too much.
Today we stock kids onesies, adult onesies, kigurumi pyjamas, dress-up costumes, costume accessories and themed party supplies for every occasion – from school holidays and birthday parties to Book Week, Halloween and Christmas.
Why Australians choose Onesie Store AU
Prices that actually make sense
Why pay $80+ for a onesie when you don't have to? Kids onesies start at $19.99 and adults from $29.99 – the same plush quality, without the brand markup.
Hundreds of styles for every occasion
Animal kigurumi, adult costumes, anime dress-ups, accessories and party supplies – perfect for birthdays, Book Week, Halloween, costume parties and lazy Sundays.
Fast dispatch from Melbourne
Every order is packed and dispatched from our Melbourne warehouse within 1–2 business days, with tracking. Free standard shipping Australia-wide on orders over $140.
Book Week, Halloween and dress-up days sorted – costumes kids actually want to wear.
Kids Costumes
Book Week, Halloween and dress-up days sorted – costumes kids actually want to wear.
Kids Costumes
✦ Animal, anime & kigurumi onesies
✦ Kids & adult sizing
✦ Costumes, accessories & party supplies
✦ Kids onesies from $19.99
Frequently asked questions
Shipping & Delivery
Shipping & Delivery
Do you ship Australia-wide?
Do you ship Australia-wide?
Yes – we ship to every state and territory in Australia. Flat-rate standard shipping applies to all orders, and it's free on orders over $140. All orders are packed and dispatched from our Melbourne warehouse within 1–2 business days.
How long does delivery take?
How long does delivery take?
Delivery to Melbourne metro usually takes 2–3 business days after dispatch. Regional areas and other states usually take 2–8 business days. You'll receive a tracking number by email once your order is dispatched.
Do you offer free shipping?
Do you offer free shipping?
Yes! All orders over $140 qualify for free standard shipping Australia-wide. Orders under $140 pay a flat standard shipping rate, shown at checkout. Express shipping is also available.
Sizing & fit
What sizes do your kids onesies come in?
What sizes do your kids onesies come in?
Our kids onesies are sized by height in centimetres: 85cm, 100cm, 110cm, 120cm, 130cm, 140cm and 150cm. Measure your child's height and check our size guide for the best fit. When in doubt, size up – onesies are designed to be worn loose.
What sizes do your adult onesies come in?
What sizes do your adult onesies come in?
Adult onesies are available in S, M, L, XL and XXL. Size S fits heights approximately 155–160cm, M fits 160–165cm, L fits 165–170cm, XL fits 170–175cm and XXL fits 175–185cm. Check individual product pages for exact measurements.
Do you have matching onesies for kids and adults?
Do you have matching onesies for kids and adults?
Yes! Many of our most popular styles – including the Unicorn, Cow, Duck and Pig onesies – are available in both kids and adult sizes. Search by the animal name to find matching options for the whole family.