Does the Mr. Peanut's Gold Series Standard (Expandable) fit Alaska Airlines?

No — the Mr. Peanut's Gold Series Standard (Expandable) (18 × 11 × 10 in) does not fit Alaska Airlines's 17 × 11 × 9.5 in under-seat limit.

18 × 11 × 10 in external · up to ~20 lb

Too big against Alaska Airlines's 17 × 11 × 9.5 in limit

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18 × 11 × 10 in is over the 17 × 11 × 9.5 in limit.

Last verified 2026-09-24 · matched to the published Alaska Airlines limit. Every fit is against the published maximum; real under-seat space varies by aircraft (why).

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