For Australia, the most affordable eSIM plan is 1 GB for 7 days at $4.73. The 2 GB plan costs $6.18 for 15 days, while 3 GB for 30 days is $7.85. The 5 GB option at $12.43 provides a good balance. For heavier use, 10 GB is $19.75, and 20 GB is $32.82. The 50 GB plan, ideal for extensive data needs, is priced at $73.47.