Once Upon a Onesie

FREE DELIVERY FOR ORDERS OVER R500 | ORDERS: 2 – 4 WORKING DAYS  | DELIVERY: 2 – 4 DAYS

ONESIE GUIDE

Our onesies are made from 100% cotton, ensuring they’re breathable and soft against your baby’s delicate skin. We have a variety of colors to choose from, and finding the perfect fit for your little one is a breeze with our Size Guide!

Whether your baby is just a tiny bundle of joy or growing up fast, we’ve got the perfect onesie size for every snuggle, crawl, and nap. From Tiny Baby to 24 months, we’re here to help you choose the comfiest, cutest fit for your little star. Let’s get sizing!

Size Guide

Just a heads-up: Weight and Age are only a guide, so please use this as a helpful reference.

Age Weight Height
Prem Baby Up to 1.7 kg Up to 50 cm
Newborn 1.8 - 4 kg Up to 52 cm
0-3 Months 4-6 kg 53-60 cm
3-6 Months 6-8 kg 61-66 cm
6-12 Months 8-10 kg 67-74 cm
12-18 Months 10-11 kg 75-81 cm
18-24 Months 11-12 kg 82-86 cm
24-36 Months 12-14 kg 94-100 cm

COLOUR Guide

Natural
Peach
Dusty Pink
Light Pink
Yellow
Orange
Light Green
Light Blue
Dusty Blue
Teal Blue
Navy Blue

Just a friendly note: Colours may vary slightly from our colour guides, please use this as a reference.

Care Guide

  • Cool Wash Only: Keep things chill by washing your onesie in cool water. It’s kinder to the fabric and keeps those colors bright.
  • No Dry Cleaning or Bleach: We’re all about the simple life—so skip the dry cleaner and bleach. Trust us, your onesie will thank you!
  • No Wringing or Tumble Dry: Gently does it! Avoid wringing out the onesie or tossing it in the tumble dryer. Let it air dry naturally to keep it in tip-top shape.
  • Warm Iron Only: A warm iron can smooth out any wrinkles, but here’s the biggie—DO NOT IRON ON THE DESIGN. We want that cute print to stay perfect!
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