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We have replaced standard sizing with our own unique ONEFOLD sizing system that leaves your children with plenty of room to grow. 

ONEFOLD’s cuts and sizes are designed to extend the life of each item. Our garments are designed to be worn across a three year age span, with an intentional varied fit each time, so the garment lasts longer.  

Our sizes deliberately run on the larger side for a longer, interchangeable wear e.g. to pass down to a sibling. Please see our sizes below, together with international clothing measurements:

  • Our 2-4 years   |   EU 92 cm - EU 104 cm   |   US 2T-4T   |   UK 2-4
  • Our 4-6 years   |   EU 104 cm - EU 116 cm   |   US 4T-6T   |   UK 4-6
  • Our 6-8 years   |   EU 116 cm - EU 128 cm   |   US 6T-8T   |   UK 6-8  

If you are unsure about what size to get for your child, please send us an email at and we will happily assist you in finding the most suitable size for your child.