Is a 25L backpack a personal item or carry-on on Ryanair?

On Ryanair, a 25L backpack is most commonly used as a personal item under the seat. However, Ryanair enforces strict personal item dimensions of 40 × 20 × 25 cm. If a 25L bag exceeds these dimensions when packed — particularly in depth — it may be reclassified as a carry-on, which requires paid priority boarding.

Do you have to pay for a 25L backpack on Ryanair?

Not if it qualifies as a personal item. Ryanair includes one free personal item (40 × 20 × 25 cm) on all fares. If your 25L bag fits within those dimensions, it flies free. If it exceeds them, you may be charged a carry-on fee at the gate, which is typically more expensive than pre-purchasing priority boarding.

Ryanair Personal Item & Carry-On — What Actually Fits

Will a 25L Backpack Fit on Ryanair?

Q: Will a 25L backpack fit on Ryanair?

A 25L backpack can work as a free personal item on Ryanair if it fits within the strict 40 × 20 × 25 cm limit. Slim, soft-structured 25L bags typically pass. Bulkier or rigid designs may exceed the depth limit and could be charged as a carry-on at the gate.

A 25L backpack usually works as a personal item on Ryanair, but larger or more structured designs may be flagged at the gate and charged as a carry-on.

Ryanair enforces strict personal item dimensions (40 × 20 × 25 cm). At 25L, whether it passes depends more on bag shape and packing density than listed volume.

Placement: Personal Item (Typical) Also: Carry-On (if bulky) Confidence: High

Last updated: March 2026

Ryanair allows one free personal item on all fares — but it must fit within 40 × 20 × 25 cm. A 25L backpack is right at the boundary of this limit. Slim, soft-structured bags with a shallow frame depth typically pass. Bulkier or fully packed 25L bags — especially those with rigid frames or external pockets — may exceed the depth limit and get flagged at the gate. If your bag doesn't qualify as a personal item, Ryanair requires paid priority boarding for carry-on access (55 × 40 × 20 cm). Buying priority at the gate is significantly more expensive than pre-purchasing online.

Check if this will actually fit your trip →

Will This Bag Actually Work for Your Trip?

Your result depends on what you pack, not just the bag size.

Trip Setup

Trip Length

Climate

Packing Profile

Laundry Access

Gear & Footwear

Gear

Laptop Bulky Layer

Extra Packed Shoes

Bag & Airline

Bag Type

Bag Size

What do these sizes mean?

Under 25L — Small personal item / daypack
30–35L — Light travel, short trips
35–45L — Standard carry-on range
45L+ — Large carry-on or checked territory

Airline

Add personal item (up to ~25L)

Use this if you plan to bring a second under-seat item like a daypack, tote, or laptop bag.

Traveler

Clothing Size

Based on real clothing volumes and packing behavior

Packing Reality Check

When Does a 25L Bag Work Well on Ryanair?

Works Well

1–3 day trips
Light packing style
Warm climates
Minimal gear
Slim-profile bags
Personal item use

Becomes a Tight Fit

4–5+ days without laundry
Cold weather gear
Bulky layers
Extra shoes
Laptop + tech gear
Structured bags (may need overhead)

Ryanair Bag Policy

Ryanair Carry-On Rules

Personal item (free)	40 × 20 × 25 cm — must fit under the seat
Carry-on (priority only)	55 × 40 × 20 cm (21.7 × 15.7 × 7.9 in) — requires paid priority boarding
Weight limit	10 kg for carry-on; no stated weight limit for personal item
Enforcement	Strict — bags are measured at the gate; oversized personal items may be charged as carry-on
Fit at 25L	Slim 25L bags often qualify as a personal item; bulkier or rigid designs may exceed the depth limit

Ryanair's personal item limit of 40 × 20 × 25 cm is one of the strictest among European carriers. At 25L, the depth dimension is the most common failure point — a slim, soft bag at 20 cm depth passes, while a structured or overpacked bag at 25+ cm depth may not. Ryanair uses sizing frames at the gate and enforcement is consistent. If your bag doesn't fit the personal item frame, you'll need priority boarding for carry-on access.

Gear

Example Bags for This Setup

Example bags that match this setup based on real packing capacity and airline limits.

Bottom Line

A 25L bag can fly free as a personal item on Ryanair — if it fits within 40 × 20 × 25 cm
Slim, soft-structured designs are most likely to pass the sizing frame at the gate
Overpacked or rigid bags risk being charged a carry-on fee — especially at the gate
Pre-purchase priority boarding if you think your bag might exceed personal item limits
Use the calculator above to check your specific trip setup

Other bag sizes on Ryanair

Will a 30L backpack fit on Ryanair? →

Will a 35L backpack fit on Ryanair? →

Will a 40L backpack fit on Ryanair? →

Same size on other airlines

Will a 25L backpack fit on Delta? →

Will a 25L backpack fit on United? →

Will a 25L backpack fit on American? →

Will a 25L backpack fit on Southwest? →

Will a 25L backpack fit on EasyJet? →

Packing guides

What to pack for a 3-day trip →

What to pack for a 5-day trip →

What to pack for a 7-day trip →

What to pack for a 10-day trip →

Not sure if it'll all fit? Try the packing calculator →

Notes

How Accurate Is This?

This tool reflects real-world packing conditions, not just theoretical bag sizes. Results are based on typical clothing volumes, packing efficiency, and common travel setups.

Ryanair enforces one of the strictest personal item policies in the industry. A 25L backpack often qualifies as a free personal item — but only if its packed dimensions fit within 40 × 20 × 25 cm. Depth is the most common failure point. Slim, compressible bags pass more reliably than structured or overpacked ones.

This is a planning tool, not a guarantee. Airline staff make the final call — packed shape, bag rigidity, and gate-day enforcement all play a role.