Our underwear and shorts designed to sit low on the hips. So its only right to measure your hips instead of your waist. If this is your first time buying SUPAWEAR we recommend going up a size.
Check out the video so you can choose the right SUPAWEAR size.
As a guide
Zara, Abercrombie, Addicted(Spain) CK will be the same sizing match to our brand.
If you wear Toots(Japan) our sizing is bigger so you will need to go down a size.
If you wear Aussiebum our sizing is smaller so you need to go up a size.
Size
XS
S
M
L
XL
INCH
27 - 28
29 - 30
31 - 32
33 - 34
35 - 36
CM
68 - 72
73 - 77
78 - 82
83 - 87
88 - 92
Chest Size Guide
This is an approximate conversion table to help you find your chest size.
WAVELENGTH considers the intersection of natural form and urban structure. Set against light-filled concrete and soft shadow, the Spring 25 collection is a textural study - where clean silhouettes meet surface depth, and quiet tension shapes the mood.
“With WAVELENGTH, I wanted to explore the tension between softness and structure - how a garment can hold shape, but still feel lived-in. It’s about finding that balance between the organic and the industrial, and creating pieces that feel grounded, but quietly expressive.”
“This collection is about finding rhythm in contrast - the balance between strength and softness, structure and flow.
I wanted each piece to feel like it belongs both in the city and in nature - to move with you, wherever you are.”
- Founder, Merryn Kelly
Inspired by Australia’s interplay of structure and space, WAVELENGTH explores contrast through silhouette, surface, and tone. Each piece is considered — refined in form, grounded in texture, and designed with intent. A collection that moves with quiet confidence, shaped by the tension between the natural and the man-made.
The sizing information below serves as a general guide, providing approximate measurements to help you determine your best fit. Please note that certain styles may vary slightly from this guide. We strive to provide accurate images and detailed sizing information within each item description. For exact garment measurements or further assistance, feel free to contact us at info@thirdform.com.au.