Size chart - Isa

Isa Shirt

Size guide

Welcome to the SÜK Size Guide. We’re hoping to make online shopping even easier by providing all our insider info about sizing and fit.

We offer a body measurement chart and a garment measurement size chart. Our sizes follow Australian numerical sizing. There is no standardised size system for clothing, so there can be variation between brands and clothing labels. This is also why we don’t provide a size conversion, as there’s no perfect way to convert sizes.

Isa Shirt Fit Guide

The Isa Shirt runs true to size, stick with your standard SÜK size. 

Garment Measurements

All measurements are in centimetres.

These measurements are taken from the flattened physical garment, and then doubled to achieve an accurate measurement. Each chart is specific to each individual style. There is a variation of 1-2cm per garment, as our styles are prewashed and preshrunk before we send them to you.

You can use garment measurements in two ways:

  1. Measure an existing comfy item of clothing and compare it to our chart.
  2. Measure your body, add approx 3-5cm length to allow for the garment to sit comfortably on your body, and compare to our chart.


4AU 6AU 8AU 10AU 12AU 14AU 16AU 18AU 20AU 22AU 24AU 26AU 28AU 30AU
Chest Circumference 93.5 96 101 106 111 116 123.5 128.5 136 143.5 151 158.5 166 173.5
Waist Circumference 74.5 77 82 87 92 97 104.5 106 113.5 121 128.5 136 143.5 151
CF Length 36 36.3 36.9 37.5 38.1 38.7 39.6 39.1 40 40.9 41.8 42.7 43.6 44.5
Sleeve Length 19.2 19.8 20.4 21 21.6 22.2 23.1 20.6 21.5 22.4 23.3 24.2 25.1 26


Body Measurements

All measurements are in centimetres.

Please use this as a general guide, if you find yourself between sizes, we suggest sizing down.


4AU 6AU 8AU 10AU 12AU 14AU 16AU 18AU 20AU 22AU 24AU 26AU 28AU 30AU
Bust 87.5 90 95 100 105 110 117.5 122.5 130 137.5 145 152.5 160 167.5
Waist 62.5 65 70 75 80 85 92.5 97.5 105 112.5 120 127.5 135 142.5
Hip 87.5 90 95 100 105 110 117.5 122.5 130 137.5 145 152.5 160 167.5



Fitting notes

Fabric Tip

We recommend an initial firm fit, as our cotton relaxes with wear. It’s similar to true denim, where the fibers soften the more you wear it. Washing will help bring it back to its original firmness. If you’re in between sizes, we generally recommend sizing down. But this is your body, and you can wear what you want and what makes you comfortable.

Measuring Tip

If you can, measure yourself in your undies. You should hold the measuring tape firm (but not digging in) to your body, with no twists or clothing in the way.

Fitting Tip

Our garments are designed to fit a wide range of bodies. In order to have the best fit, some styles are better suited for certain bodies shapes. This is all subjective, and you can wear what you like! These are just recommendations and what we’ve found suits from our time fitting people in store.

Style Tip

Sorry, no plumbers bum here. We’re all about high waisted pants. All our styles are designed with this in mind.