Couriers Please :

Unless specified the maximum weight allowed for a consignment is 150kg and the maximum cube is 0.6 cubic meter.

Sendle :

Maximum sizes

Things to keep in mind:

If you send a parcel that’s under 20kg but longer than 1.2m, that’s cool too: we’ll just bump it up to the 20kg weight bracket and price (as long as it’s still under 1.8m long).
If the item you’re sending is oversized, you may be charged an oversize penalty fee of $22 including GST.

Auspost :

Maximum parcel size and weight1
Destination Maximum weight Maximum length2 Maximum dimensions
Domestic 22kg 105cm 0.25 cubic metres
International 20kg 105cm 140cm girth

Aramex :

Aramex carries up to 25kg actual weight or 40kg cubic weight.

Length surcharge is applicable on any consignments where the greater of the length, width or height exceeds 1.2m.