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

No. Too long by 1 cm. It's 56 cm top to bottom and Lufthansa allows 55 cm. It's too big for Lufthansa's personal item (16 cm too long).

Won't fit

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Side the bag fails onPart that sticks outSizer frame

Won't fit

Too long by 1 cm. It's 56 cm top to bottom and Lufthansa allows 55 cm.

BagPeak Design Travel Backpack 45L

Cabin bagLufthansa

Length: 56of 55 cm1 cm over
Width: 33of 40 cm7 cm spare
Depth: 23of 23 cmExact fit

Weight8 kg limit

Packed weightkg

Empty it weighs 2 kg, leaving 6 kg for your things.

What you can do

Take a bag 55 cm tall or less. 8 bags we list fit.
Or check it in when you book. It's usually cheaper than paying at the gate.
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 Lufthansa

Lufthansa rules checked 2 Nov 2026. Source. Sizes include wheels and handles. Some details are still being confirmed.

Side by side

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

Cabin bag: 55 × 40 × 23 cm, 8 kg
Side	Bag	Limit	Result
Length	56 cm	55 cm	1 cm over
Width	33 cm	40 cm	7 cm spare
Depth	23 cm	23 cm	Exact

Personal item: 40 × 30 × 10 cm
Side	Bag	Limit	Result
Length	56 cm	40 cm	16 cm over
Width	33 cm	30 cm	3 cm over
Depth	23 cm	10 cm	13 cm over

Empty it weighs 2 kg of the 8 kg limit.

Lufthansa rules worth knowing

Cabin bag: Not included on the cheapest Economy Basic short-haul fare from May 2026.
Personal item: Some 2026 guides list 40×30×15; we use Lufthansa's long-standing 10 cm depth until confirmed.
Business and First may bring two 8 kg cabin bags.

Airlines where the Peak Design Travel Backpack 45L fits

Singapore Airlines Frontier Airlines Southwest Airlines AirAsia All airlines

Bags that fit Lufthansa's cabin bag

Biggest first.

Rimowa Essential Cabin55 × 39 × 23 cmTightExact fitBag page
American Tourister Soundbox Spinner 5555 × 40 × 20 cmTightExact fitBag page
Horizn Studios H5 Cabin Luggage55 × 40 × 20 cmTightExact fitBag page
Samsonite C-Lite Spinner 5555 × 40 × 20 cmTightExact fitBag page

Good to know

What can I do if the Peak Design Travel Backpack 45L is too big for Lufthansa?

Add a checked bag when you book, which is usually cheaper than paying at the gate, or bring a smaller cabin bag. The Peak Design Travel Backpack 45L does fit Singapore Airlines, Frontier Airlines and Southwest Airlines.

What is Lufthansa's cabin bag size limit?

Lufthansa's cabin bag limit is 55 × 40 × 23 cm, up to 8 kg.

Which other bags fit Lufthansa?

Rimowa Essential Cabin, American Tourister Soundbox Spinner 55, Horizn Studios H5 Cabin Luggage and Samsonite C-Lite Spinner 55 are right on the limit, so don't overpack.