Sold a few sails lately and was shocked by the freight cost from various courier companys, so in dispair took one to the local post office to see what they had to say. Posted a 5.5 wave sail, fully wrapped in cardboard and weighing in at over 6 kgs for a grand total of $19.50 Just posted another off today (a 6.0 mtr freerace- also interstate) and it set me back $20.20. So if you have a sail to post off, it's well worth seeing your local post office first.

e-go depot to depot is cheaper, I paid about $18 for a 7.5 , including $50 insurance.

Yes I would have thought a sail would be too large as I couldn't send some paintings to NZ they were too big..

Sounds like your PO employees don't know the rules..