GateSizer

Does the American Tourister Soundbox Spinner 55 fit Southwest Airlines' carry-on?

Yes, just. Fits with 0.6 cm to spare on the tightest side. It's too big for Southwest Airlines' personal item (13.7 cm too long).

Tight fit

Flying with
61 × 40.6 × 25.4 cm
Checking
55 × 40 × 20 cm, hard shell
Units
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Side the bag fails onPart that sticks outSizer frame

Tight fit

Fits with 0.6 cm to spare on the tightest side.

BagAmerican Tourister Soundbox Spinner 55
Cabin bagSouthwest Airlines
Length
55of 61 cm6 cm spare
Width
40of 40.6 cm0.6 cm spare
Depth
20of 25.4 cm5.4 cm spare
WeightNo published limit on Southwest Airlines

Gate staff can still refuse a bag you can't lift into the bin yourself.

What you can do

  • Pack it before you measure. A full pocket can add 3 to 5 cm.

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

See bags that fit Southwest Airlines

Southwest Airlines rules checked 2 Nov 2026. Airline's page. Sizes include wheels and handles.

Side by side

American Tourister Soundbox Spinner 55 against Southwest Airlines' limits. Bags can be turned, so the longest side is compared with the longest limit.

Carry-on: 61 × 40.6 × 25.4 cm
SideBagLimitResult
Length55 cm61 cm6 cm spare
Width40 cm40.6 cm0.6 cm spare
Depth20 cm25.4 cm5.4 cm spare
Personal item: 41.3 × 34.3 × 20.3 cm
SideBagLimitResult
Length55 cm41.3 cm13.7 cm over
Width40 cm34.3 cm5.7 cm over
Depth20 cm20.3 cm0.3 cm spare

Southwest Airlines rules worth knowing

  • Carry-on: 24 × 16 × 10 in, bigger than most US airlines allow.
  • Personal item: 16.25 × 13.5 × 8 in.
  • A bag packed to Southwest's limit may not fit a connecting Delta or United flight.

Bags that fit Southwest Airlines' carry-on

Biggest first.

Good to know

Will the American Tourister Soundbox Spinner 55 still fit Southwest Airlines 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 Southwest Airlines' carry-on size limit?

Southwest Airlines' carry-on limit is 61 × 40.6 × 25.4 cm, with no published weight limit.

Which other bags fit Southwest Airlines?

Rimowa Essential Cabin and Travelpro Maxlite 5 21" Expandable Spinner fit with room to spare. Samsonite Freeform Carry-On Spinner and Away Bigger Carry-On are right on the limit.