Some ideas for downsizing your (unused) wardrobe:
1. Give to Family
2. Give to Friends
3. Donate to Vinnies or Anglicare
4. Sell on ebay or gumtree. You can also give away for free on gumtree.
5. Go to a clothes swap e.g. The Clothing Exchange in Sydney
Visit: The Clothing Exchange
6. Fitted for Work - helping disadvantaged women get back into the workforce
Visit: Fitted for Work
7. Offer it for free on FB. Or Freecycle.