I combine up to 5 items over a 7day purchasing period, which I call 'Flat Rate' postage.
To receive the 'Flat Rate' for multiple items purchased, you need to message me prior to paying for your items so that I can adjust the postage cost amount payable.
Total postage for up to 5 combined items is $2.00 for Australian buyers and $4.00 for international buyers, if the items can fit into a 'DL' sized envelope and weigh less than 50g.