Expandable Metro Duffel

Knack Expandable Metro Duffel is a 26L, 1.36kg3lb duffel measuring 33×43.2×22.9cm13×17×9in. It fits the carry-on size limit of 31 of 36 major airlines and the personal-item limit of 0 of 26. Under the seat, its 22.9cm9in side is over the 20cm7.9in limit at 15 of the 26 airlines it misses. Specs from knackbags.com, checked September 2026.

Volume: 26Lexpands to 36L
Weight: 1.36kg3lb3lb1.36kg
Carry-on: 31/36airlines fit it
Personal item: 0/26under-seat limits

Dimensions: 33×43.2×22.9cm13×17×9in 13×17×9in33×43.2×22.9cm
Price: $145 as of September 2026
Laptop: up to 16"
Opening: zip top
Warranty: not published
Compartments: n/a
Bottle pockets: 1

Price history

$145 at every weekly check since Oct 5, 2026 (3 checks).

Checked weekly on the brand's US store.

Organizer
Water-resistant
Shoulder strap (removable)
Luggage pass-through

Material: Water-resistant 900 x 1200 denier high-twist high-density polyester, 150D antimicrobial nylon lining

Hidden 10 L expansion compartment (26 L to 36 L)
Padded 16 in laptop pocket in the front organization compartment
Interior bottle pocket fits a 1 L Hydro Flask

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Last checked: 2026-09. Prices and specs may have changed.

Does the Knack Expandable Metro Duffel fit airline carry-on limits?

Draw against

Too bigToo big on Ryanair. cabin bag 55×40×20cm21.5×15.5×8in · under the seat 40×30×20cm15.5×12×8in. Bag in cminches, turned to fit.

Flag as a tight fit undercm spare

Airline	Carry-on	Personal item	Cabin-bag weight
Air Arabia	Too bigToo big	Too bigToo big	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
Air CanadaCabin bag not on every fare	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	No published limitNo published limit
Air FranceCabin bag not on every fare	FitsFits	Too bigToo big	10.6kg to pack (of 12kg shared with personal item)23.4lb to pack (of 26.5lb shared with personal item)
Air India	Too bigToo big	No published limit	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
AirAsia	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	5.6kg to pack (of 7kg shared with personal item)12.3lb to pack (of 15.4lb shared with personal item)
Alaska Airlines	Tight fit (0.1cm spare)Tight fit (0in spare)	No published limit	No published limitNo published limit
Allegiant AirCabin bag not on every fare	FitsFits	Too bigToo big	No published limitNo published limit
American Airlines	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	No published limitNo published limit
ANA (All Nippon Airways)	FitsFits	Too bigToo big	8.6kg to pack (of 10kg shared with personal item)19lb to pack (of 22lb shared with personal item)
AviancaCabin bag not on every fare	FitsFits	No published limit	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
British Airways	FitsFits	Too bigToo big	No published limitNo published limit
Cebu Pacific	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	8.6kg to pack (of 10kg shared with personal item)19lb to pack (of 22lb shared with personal item)
Delta Air Lines	Tight fit (0.1cm spare)Tight fit (0in spare)	No published limit	No published limitNo published limit
easyJetCabin bag not on every fare	FitsFits	Too bigToo big	13.6kg to pack (of 15kg)30lb to pack (of 33.1lb)
Emirates	Too bigToo big	No published limit	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
Frontier AirlinesCabin bag not on every fare	FitsFits	Too bigToo big	14.5kg to pack (of 15.9kg)32lb to pack (of 35.1lb)
Gol Linhas Aereas	FitsFits	No published limit	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
IndiGo	FitsFits	No published limit	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
JetBlue Airways	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	No published limitNo published limit
KLMCabin bag not on every fare	FitsFits	Too bigToo big	10.6kg to pack (of 12kg shared with personal item)23.4lb to pack (of 26.5lb shared with personal item)
LATAM Airlines	FitsFits	Too bigToo big	10.6kg to pack (of 12kg)23.4lb to pack (of 26.5lb)
LufthansaCabin bag not on every fare	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	6.6kg to pack (of 8kg)14.6lb to pack (of 17.6lb)
Norwegian Air ShuttleCabin bag not on every fare	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	8.6kg to pack (of 10kg shared with personal item)19lb to pack (of 22lb shared with personal item)
Qantas	Tight fit (0.1cm spare)Tight fit (0in spare)	No published limit	5.6kg to pack (of 7kg shared with personal item)12.3lb to pack (of 15.4lb shared with personal item)
Qatar Airways	FitsFits	No published limit	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
RyanairCabin bag not on every fare	Too bigToo big	Too bigToo big	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
SAS	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	6.6kg to pack (of 8kg)14.6lb to pack (of 17.6lb)
Singapore Airlines	FitsFits	Too bigToo big	5.6kg to pack (of 7kg)12.3lb to pack (of 15.4lb)
Southwest Airlines	FitsFits	No published limit	No published limitNo published limit
Turkish Airlines	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	6.6kg to pack (of 8kg)14.6lb to pack (of 17.6lb)
United AirlinesCabin bag not on every fare	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	No published limitNo published limit
Vietjet Air	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	5.6kg to pack (of 7kg shared with personal item)12.3lb to pack (of 15.4lb shared with personal item)
VolarisCabin bag not on every fare	FitsFits	Too bigToo big	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
VuelingCabin bag not on every fare	Too bigToo big	Too bigToo big	8.6kg to pack (of 10kg)19lb to pack (of 22lb)
WestJetCabin bag not on every fare	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	No published limitNo published limit
Wizz AirCabin bag not on every fare	Tight fit (0.1cm spare)Tight fit (0in spare)	Too bigToo big	8.6kg to pack (of 10kg)19lb to pack (of 22lb)

Compared in any orientation against each airline's published size limit. A tight fit has under 2cm to spare, so a packed soft bag may not pass a sizer. Set it to 0 to turn the warning off. Weight is what the airline allows in the cabin minus this bag's empty 1.36kg3lb. Limits and sources. Own a different bag? Check it against every airline.