Best Backpacks for Ryanair Priority: 55×40×20 cm Picks
Travel backpacks that fit Ryanair's strict 55×40×20 cm overhead limit for Priority passengers. Five picks that pass the size gauge.
Ryanair Priority Boarding passengers are allowed a carry-on bag up to 55 × 40 × 20 cm in the overhead bin, plus a small 40 × 20 × 25 cm personal bag under the seat. If you prefer travelling with a backpack rather than a wheeled suitcase, finding one that actually fits within the 55 × 40 × 20 cm limit — and passes Ryanair's physical bag sizer at the gate — requires care.
The 20 cm depth is the critical dimension. Most travel backpacks are deeper than 20 cm when packed. The five backpacks below are specifically chosen because they can realistically fit within 55 × 40 × 20 cm when loaded with travel gear.
The 20 cm depth problem
The majority of travel backpacks marketed as "Ryanair compatible" are 30 cm or more deep when packed. The 20 cm depth limit means you're looking at relatively flat-profile bags — more briefcase-like than the boxy hiking-style packs.
Ryanair's size gauges at major hubs like Dublin, Stansted, and Madrid Barajas are real, and they're accurate. A bag that measures 22 cm deep at home will fail the gauge. This guide focuses on backpacks that genuinely fit 20 cm or that are explicitly designed for this size range.
Our top picks
1. Cabin Zero Classic 36L — Best overall Ryanair backpack
Dimensions: 45 × 30 × 20 cm | Weight: 0.49 kg | Capacity: 36 litres
CabinZero makes bags specifically to pass airline size gauges, and the Classic 36L is built precisely for the 20 cm depth standard. At 0.49 kg it is one of the lightest cabin bags available, leaving generous room within Ryanair's 10 kg combined weight limit.
Pros:
- Designed specifically for strict budget airline size limits
- Extremely light — 490 g empty means more capacity for contents
- Water-resistant exterior with TSA-approved padlock loops
Cons:
- No frame or structure — the bag collapses when not full
- No dedicated laptop compartment in the base model
- No external pockets, which some travellers find limiting
Note: Placeholder ASIN — verify the listing before purchasing.
2. Osprey Farpoint 40 — Best for backpackers
Dimensions: 55 × 34 × 22 cm | Weight: 1.5 kg | Capacity: 40 litres
The Osprey Farpoint 40 is one of the most recommended travel backpacks in the world. At 55 × 34 × 22 cm it's technically 2 cm too deep for strict Ryanair measurement — but the soft construction means it can compress to fit the gauge, and in practice many travellers use it without issue. The hidden harness system makes it look like a regular bag when the panel is zipped shut.
Pros:
- Harness and hip belt hide behind a zippered panel
- Soft construction compresses to squeeze past strict size gauges
- 40-litre capacity for up to a week of travel
Cons:
- Technically 2 cm too deep — a risk at strictly enforced gates
- Heavier than lightweight alternatives at 1.5 kg
Note: Placeholder ASIN — verify the listing before purchasing.
3. Hynes Eagle 40L Flight Approved Backpack — Best budget pick
Dimensions: 55 × 40 × 20 cm | Weight: 0.89 kg | Capacity: 40 litres
The Hynes Eagle is specifically designed and marketed for the 55 × 40 × 20 cm airline limit. It's one of the few backpacks that is consistently described by buyers as genuinely fitting Ryanair's gauge. The 40-litre capacity is substantial, and the lightweight 890 g frame leaves 9.1 kg of the 10 kg limit for contents.
Pros:
- Built to exactly 55 × 40 × 20 cm specification
- Competitive price point for the capacity
- Multiple external pockets for organisation
Cons:
- Materials are functional rather than premium
- Padded laptop compartment limited to 15-inch devices
Note: Placeholder ASIN — verify the listing before purchasing.
4. Tortuga Outbreaker 35L — Best premium option
Dimensions: 55 × 35 × 20 cm | Weight: 1.36 kg | Capacity: 35 litres
Tortuga builds backpacks specifically for carry-on travel, and the Outbreaker 35L is their flagship. The clamshell opening makes packing and unpacking as easy as a suitcase, and the 20 cm depth is a deliberate design choice for compliance with strict airline gauges.
Pros:
- Clamshell opening for suitcase-style organisation
- Lockable YKK zippers for security
- Built precisely for airline carry-on depth limits
Cons:
- Higher price than most backpack alternatives
- 35-litre capacity is slightly smaller than alternatives in this category
Note: Placeholder ASIN — verify the listing before purchasing.
5. Ryanair Cabin Bag by EasyLuggage — Best compliance guarantee
Dimensions: 55 × 40 × 20 cm | Weight: 0.75 kg | Capacity: 38 litres
EasyLuggage makes a bag literally called the "Ryanair Cabin Bag" — it's built to exact specification and comes with a size guarantee. Not the most inspiring name, but when the alternative is a €50 gate check fee, the pragmatic choice has its appeal.
Pros:
- Built to exact Ryanair specification with compliance guarantee
- Very light at 750 g
- Full-length zip opening for easy access
Cons:
- Basic styling — purely functional
- Limited availability in some regions
Note: Placeholder ASIN — verify the listing before purchasing.
Tips for getting your backpack through Ryanair's gauge
Pack light and test at home. Pack everything you plan to take, then check the dimensions with a tape measure. Bags change shape when loaded.
Know your gate. Enforcement is tightest at Dublin, Stansted, Madrid Barajas, and Rome Fiumicino. It's lighter at smaller regional airports.
Buy Priority Boarding before you fly. Without Priority Boarding, you don't get the 55 × 40 × 20 cm overhead allowance at all — your bag must fit in the much smaller 40 × 20 × 25 cm under-seat limit.
Use the CarrySizer bag fit checker to check your bag against Ryanair's exact rules before you buy.
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