Boarding Sizer · 2026 ● Cleared

Amazon Basics 21-Inch Hardside Carry-On on Southwest Airlines

Bag 21.7×14.8×10" vs sizer 24×16×10"

✓ Cleared

Overhead Carry-On Verdict

Yes — it fits the bin.

Personal Item · Under-Seat ✕ Too big

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Route SOU · AMA

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The verdict, explained

At 21.7x14.8x10", the Amazon Basics 21-Inch Hardside Carry-On fits inside Southwest Airlines's 24x16x10" carry-on allowance, right at the limit. It should slide into the overhead bin without trouble at the gate sizer. On Southwest Airlines: Generous 24x16x10 carry-on plus two free checked bags. It is too large for Southwest Airlines's under-seat personal-item space, so it has to go overhead or be checked.

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Dimension Breakdown inches

Axis	Bag	Sizer	Margin
Length	21.7"	24"	+2.3"
Width	14.8"	16"	+1.2"
Height	10"	10"	+0"

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Frequently asked

Does the Amazon Basics 21-Inch Hardside Carry-On fit Southwest Airlines's carry-on size limit?

Yes. The Amazon Basics 21-Inch Hardside Carry-On fits within Southwest Airlines's 24x16x10" carry-on allowance and can go in the overhead bin.

What is Southwest Airlines's carry-on size limit?

Southwest Airlines allows carry-on bags up to 24x16x10" (length x width x height), including wheels and handles. Generous 24x16x10 carry-on plus two free checked bags.

Can the Amazon Basics 21-Inch Hardside Carry-On be a personal item on Southwest Airlines?

No. At 21.7x14.8x10" it is too big for Southwest Airlines's under-seat personal-item space (18.5x13.5x8.5"); it travels as a carry-on instead.

Bags that clear Southwest Airlines's sizer

Alternatives that fit the 24×16×10" limit outright.

The Amazon Basics 21-Inch Hardside Carry-On on other airlines

Same bag, different sizers — check before a connecting or return flight.

The bag

Amazon Basics 21-Inch Hardside Carry-On

Hardside Spinner · 21.7×14.8×10"

The Amazon Basics 21-Inch Hardside Carry-On is a hard-shell hardside spinner measuring 21.7x14.8x10 inches. Its rigid shell keeps a fixed shape, so its measured size is exactly what the gate sizer sees.

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💡 At the gate

Airlines measure at the widest external point — wheels, handles, and bulging pockets all count. Pull soft-bag compression straps fully tight before you size it.