Originally Posted by
funkydrummer
Officially, the small bag allowance is 40 cm x 20 cm x 25 cm. Back when FR introduced this, they claimed their sizers were up to 25% larger than this, effectively allowing you to take an item of up to 42 cm × 30 cm × 20 cm.
The sizer is about 42 cm x 20.5 cm x 29.5 cm, and the 29.5 cm is the depth which is open on top so you can probably go a bit bigger even if it protudes the edge a bit. There are quite a lot of sizers around in the network though. Ryanair are generally fairly relaxed about this, the days of avidly pinging bags are long gone, but if you want total peace of mind you have to stick to the advertised dimensions. That said, gate crew get fairly sharp at accurately knowing what bags fit and don't fit. There may be many badges on bags, but actually there aren't so many different bag sizes out there. So if your bag has wheels and is a known suspect then you may get unlucky. If it is a shoulder bag and you carry it way off ground level - where the ground agents will be focusing their attention, if any - then I doubt you will have much of a problem.
Old press release:
https://corporate.ryanair.com/news/n...arding-delays/