WFSAVE10FREEXPRS150
As well as the above these guy have a Try 2 Anything system where you can order 2 items, pay an extra $3, and they include a free return shipping label so you can return the item you don't want for a refund:
https://www.wildfiresports.com.au/try-2-anything/
I ordered 2 pairs of hiking boots recently so I could get the right size, they refunded the returned pair the day they received them back, there should be more stores doing this!.