Does the Peak Design Travel Backpack 45L fit Qantas' cabin bag?

Yes, just. Exactly the limit on at least one side. A bulging pocket would push it over. It's too big for Qantas' personal item (No size published).

Tight fit

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Side the bag fails onPart that sticks outSizer frame

Tight fit

Exactly the limit on at least one side. A bulging pocket would push it over.

BagPeak Design Travel Backpack 45L

Cabin bagQantas

Length: 56of 56 cmExact fit
Width: 33of 36 cm3 cm spare
Depth: 23of 23 cmExact fit

Weight7 kg limit

Packed weightkg

Empty it weighs 2 kg, leaving 5 kg for your things.

What you can do

Pack it before you measure. A full pocket can add 3 to 5 cm.
Fits 4 other airlines, including Singapore Airlines and Frontier Airlines. See all

We haven't checked this bag's size against the brand yet.

See bags that fit Qantas

Qantas rules checked 2 Nov 2026. Airline's page. Sizes include wheels and handles. Some details are still being confirmed.

Side by side

Peak Design Travel Backpack 45L against Qantas' limits. Bags can be turned, so the longest side is compared with the longest limit.

Cabin bag: 56 × 36 × 23 cm, 7 kg
Side	Bag	Limit	Result
Length	56 cm	56 cm	Exact
Width	33 cm	36 cm	3 cm spare
Depth	23 cm	23 cm	Exact

Empty it weighs 2 kg of the 7 kg limit.

Qantas rules worth knowing

Cabin bag: International Economy. Domestic jet flights are more generous; Dash 8 flights are smaller.
Personal item: One small personal item on most jet flights; not allowed on some.

Airlines where the Peak Design Travel Backpack 45L fits

Singapore Airlines Frontier Airlines Southwest Airlines AirAsia All airlines

Bags that fit Qantas' cabin bag

Biggest first.

Cabin Max Metz 30L45 × 36 × 20 cmTightExact fitBag page
CabinZero Classic 36L45 × 31 × 20 cmFits3 cm to spareBag page
WANDF Personal Item Duffel45 × 32 × 16 cmFits4 cm to spareBag page
Horizn Studios Gion Shoulder Bag27 × 18 × 5.5 cmFits17.5 cm to spareBag page

Good to know

Will the Peak Design Travel Backpack 45L still fit Qantas when it's packed?

Only just. Keep the front pockets flat and the expansion zip closed, and measure it packed before you leave.

What is Qantas' cabin bag size limit?

Qantas' cabin bag limit is 56 × 36 × 23 cm, up to 7 kg.

Which other bags fit Qantas?

CabinZero Classic 36L, WANDF Personal Item Duffel and Horizn Studios Gion Shoulder Bag fit with room to spare. Cabin Max Metz 30L is right on the limit.