After many trips to Australia and other plane trips we have this packing thing down.
Most below is from the airline restrictions. Also check with the individual airline to see what they allow. Weights can vary.
Your Carry On
23 cm x 40 cm x 55 cm (9 in x 15.5 in x 21.5 in) Wheels and handles included 10 kg (22 lb)
16 cm x 33 cm x 43 cm maximum weight 10 kg (22 lb)
Examples of standard or personal articles (as determined by their size) According to the airline
•Carry-on bag, roller bag, backpack, briefcase,
•Garment bag (size and weight restrictions apply),
•Diplomatic or consular bag,
•Cat or small dog in its carrier,