bag vs limit
0.5" overTopo Designs Rover Pack Mini
13.5 × 8.5 × 3.75 inEnormous margin against every limit here, and it looks like a normal bag rather than travel gear. Ten litres is a daybag though, not a travel bag.
Aer Lingus allows a cabin bag of 55 × 40 × 24 cm — 21.7 × 15.7 × 9.4 inches — and weighs it at 10 kg (22 lb), which most US carriers never do. The under-seat item is 33 × 25 × 20 cm.
Fare class: Not published per fare tier — the allowance is set by aircraft and service type, not by Saver, Plus or Advantage.
The trap is regional: Aer Lingus Regional allows only 48 × 33 × 20 cm at 7 kg, and if you connect onto a regional leg that 7 kg applies to the whole journey. The personal item is also one of the smallest here.
Measure the outside, wheels and handles included — that’s what they measure at the gate.
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Enormous margin against every limit here, and it looks like a normal bag rather than travel gear. Ten litres is a daybag though, not a travel bag.
55 × 40 × 24 cm, which is 21.7 × 15.7 × 9.4 inches, up to 10 kg (22 lb).
Yes — 33 × 25 × 20 cm, or 13 × 9.8 × 7.9 inches. It goes under the seat in front of you.
No — it is 0.3 inches over. Aer Lingus allows 21.7 × 15.7 × 9.4 inches, and the standard US 22 × 14 × 9 does not fit inside that.
Not published per fare tier — the allowance is set by aircraft and service type, not by Saver, Plus or Advantage.
Of the bags we track, 8 of 16 carry-ons fit the cabin limit and 1 of 25 personal items fit the under-seat limit. All of them are under the weight limit empty.
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.
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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