The short version: this site collects nothing about you. No account, no analytics, no cookies, no third-party requests. What follows is the detail, because saying “nothing” without showing your working is not worth much.
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Two things do involve other companies, and you should know about both:
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If this ever stops being accurate — if we add analytics, for instance — this page changes first and the date below changes with it.
Last updated 2026-08-12.
Manufacturers publish dimensions inconsistently, and a “20-inch” spinner is almost never 20 inches once you count the wheels. Where a brand states dimensions including wheels and handles, that’s the number we use. Where it only publishes the case, we say so on the card. Airlines measure the outside of your bag — wheels, handles, straps and all. Anything marked borderline is down to the gate agent, and remember that a soft bag squashes into a sizer while a hard shell won’t.
As an Amazon Associate we earn from qualifying purchases. Product links on this page are affiliate links and cost you nothing extra.
Limits verified August 2026 against each carrier’s published policy. Airlines change these without notice — always confirm before you fly. Spirit Airlines ceased operations on 2 May 2026 and is no longer listed.
Airline Bag Size Checker v1.0.15 · last updated 2026-08-12