17 Sundays is an Australian label based in Victoria. Known for their 'slow fashion' ethos, they only produce a new line every major season (Summer/Winter) and specialise in foundational 'basics'.
Sizes are from 12/14 - 26. Check size guide as their sizing is generous compared to other labels.
30% off also available via The Iconic but not as varied and no outlet comparison - https://www.theiconic.com.au/17-sundays/