Size Guide

ONCEWAS SIZE GUIDE

OnceWas garments range from relaxed silhouettes to more tailored fits, varying thoughtfully across styles and fabrications.

All garment measurements are provided on each product page under “Size & Fit,” to help you understand the specific measurements for each style. These measurements are taken of the garment lying flat. To ensure the best fit, we recommend using a tape measure to compare these measurements with a similar item from your wardrobe.

Please refer to the instructions below for guidance on accurately taking your own measurements.

BUST

Measure around the fullest part. Arms should be down by your side and slightly apart. Make sure the measuring tape is straight across the body.

TRUE WAIST

Measure around the natural waist line with the measuring tape straight across the body.

HIP

Measure around the fullest part of hip with the measuring tape straight across the body.

SIZE METRICS

AU SIZE	AU6	AU8	AU10	AU12	AU14	AU16	AU18	AU20
OW SIZE	0	1	2	3	4	5	6	7
GENERIC	XXS	XS	S	M	L	XL	2XL	3XL
US	2	4	6	8	10	12	14	16
BUST (CM)	80–85	85–90	90–95	95–100	100–105	105–110	110–115	115–120
WAIST (CM)	60–65	65–70	70–75	75–80	80–85	85–90	95–100	100–105
HIP (CM)	88–93	93–98	98–103	103–108	108–113	113–118	123–128	128–133

UNDER 5'4 SIZING

UNDER 5'4 AU SIZE	AU6	AU8	AU10	AU12	AU14	AU16
UNDER 5'4 OW SIZE	0	1	2	3	4	5
GENERIC	XXS	XS	S	M	L	XL
US	2	4	6	8	10	12
BUST (CM)	80–85	85–90	90–95	95–100	100–105	105–110
WAIST (CM)	60–65	65–70	70–75	75–80	80–85	85–90
HIP (CM)	88–93	93–98	98–103	103–108	108–113	113–118

UNDER 5'4 COLLECTION

Our Under 5'4 collection is thoughtfully designed for women under 5'4/162cm and under.

Available in sizes AU6 – AU16, our Under 5'4 collection is carefully adjusted to flatter petite heights without compromising on style, fit or comfort - with no tailoring required!

If you love our main range but find yourself needing to shorten hems, adjust sleeves or feeling overwhelmed by excess volume, the Under 5'4 collection is designed for you. The sizing remains consistent with our core range, with lengths reduced and volume carefully balanced in the design details, ensuring a more proportioned and effortless fit for shorter frames.

SHOP UNDER 5'4

ECOMMERCE MODELS

If you require further fitting advice please email us at hello@oncewas.com.au or call our customer care during business hours and we can help you find the perfect fit.