Originally Posted by BruceyBonus

It depends what extras you bought.

When booking (after sometime in November 2018), you would have been presented with three options:

• Small carry on only (no extra fee) - size 40x20x25cm
• Priority & 2 cabin bags (aka speedy boarding) - allows one carry on of max 10kg size 55x40x20cm plus a second size 40x20x25cm - normally around €6 to €8
• 10kg check in bag - allows one checked in bag of max 10kg size 55x40x20cm (*must* be checked in at the desk before security and *must* meet the size, even though it isn't going in the cabin) plus a carry on bag of size 40x20x25cm - normally around €8 to €10

You can also purchase a 15kg or 20kg checked in bag, in addition to any of the above options.

Measure you bag and check you booking. If your bag is too big, get a smaller one or pay the extra. Don't chance it, as Ryanair staff are good at spotting oversized bags (although not as overzealous as they used to be).