Ryanair Bag Sizer: Measure the Packed Bag
Compare your packed bag with Ryanair’s 40×30×20 cm free allowance or 55×40×20 cm Priority allowance. No assumed sizer tolerance.
Sources and scope
Source-based research; no hands-on test or specialist review claimed.
40×30×20 cm free underseat; Priority adds a 55×40×20 cm, 10 kg bag. Checked options differ.
Ryanair-operated flights; policy facts only
Cabin Baggage; Checked BaggageSource review: · Codex (AI source review)
Basic, Regular and Plus include different bags.
Ryanair fare bundles
Fare bundle definitionsSource review: · Codex (AI source review)
The free Ryanair bag allowance is 40×30×20 cm. Priority & 2 Cabin Bags adds a 55×40×20 cm bag up to 10 kg. Use those published limits when choosing a bag; do not plan around an unverified tolerance in a particular airport sizer.
Measure in the condition you will travel
Pack the bag, close expansion zips, and include wheels, handles and bulging pockets in the external measurements. Measure three perpendicular dimensions. Compare the entire packed shape, not the empty fabric shell or the advertised litre capacity.
Example: 55×40×23 cm exceeds a 55×40×20 cm box by 3 cm on one side. Calling it “cabin approved” does not remove that difference. A soft bag can change shape, but only its actual packed dimensions establish whether it is within the limit.
Check the fare as well
A correctly sized overhead bag still needs Priority & 2 Cabin Bags in the booking. If you have Basic, the free option is the smaller underseat bag. Select that fare in the checker.
We have not tested airport sizers or measured the frequency of gate checks. Claims that staff routinely allow an extra centimetre, ignore a separate laptop or accept a bag because a flight is quiet are not a reliable packing rule.
Sources: Ryanair bag policy and fare bundles, checked 5 September 2026.
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