Ryanair are very strict,be careful as it will end up costing you ! Cabin baggage size is standard with all airlines 55x40x20 so that it can fit into the overhead lockers. However Ryanair are particularly strict on the baggage weight max 10kg. Sounds like you've bought a standard sized bag.

Ryanair is notoriously strict regarding baggage compliance to maintain its low-cost model and quick turnaround times. Every fare includes one free small personal bag (40 x 20 x 25 cm) that must fit under the seat; if it doesn't fit in the "sizer" at the gate, you will be charged a significant fee (often £45/€45 or more) to have it placed in the hold. In 2026, the airline has increased enforcement, even offering staff incentives to identify oversized bags. Rigid suitcases or overstuffed backpacks are the most common targets. To avoid issues, many travelers purchase the "Priority & 2 Cabin Bags" option, which allows a second 10kg wheelie bag for the overhead locker. It is vital to measure your bag when fully packed, as even a protruding wheel or pocket can trigger a fine. While duty-free bags are generally permitted alongside your allowance, any "extra" laptop bags or handbags should be tucked inside your main bag before you reach the boarding agent to ensure a "one-bag" appearance.

Ryanair is very strict with its baggage policy, and they enforce it rigorously to maximize revenue from extra fees. Here’s what you need to know to avoid surprises:

1. Cabin Baggage Allowance (Free)

• 1 Small Personal Bag (Free):
• Max dimensions: 40cm x 20cm x 25cm (must fit under the seat).

• No weight limit, but you must be able to lift it into the overhead bin yourself.

• Priority Boarding (Paid Option):

• Allows 1 small personal bag (above) + 1 larger cabin bag (max 55cm x 40cm x 20cm, max 10kg).
• If you don’t pay for Priority, you cannot bring the larger cabin bag for free.

2. Checked Luggage (Paid)

• 10kg, 15kg, 20kg, or 25kg options available at booking (cheaper than at the airport).
• Max dimensions: 81cm x 119cm x 119cm (linear dimensions ≤ 320cm).
• Overweight fees are steep (€11-€25 per extra kg at the airport).

3. Strict Enforcement

• Size Checks: Ryanair often uses baggage sizers at the gate. If your bag is too big, you’ll pay €25-€70 to check it.
• Weight Checks: If your cabin bag exceeds 10kg (with Priority), you may be forced to check it for a fee.
• One-Bag Rule: Without Priority, only the small personal bag is allowed—no exceptions.

Tips to Avoid Fees

✔ Measure & weigh your bags before flying.
✔ Buy Priority if you need a larger cabin bag.
✔ Pre-book checked luggage online (cheaper than at the airport).
✔ Wear/bulk out heavy items if close to the weight limit.

Ryanair makes a lot of money from baggage fees, so stick to their rules exactly to avoid extra charges!