Joybuy Insights

Choosing a Ryanair backpack measuring 40 x 30 x 20 cm: a practical guide to hand luggage and short trips

A Ryanair backpack measuring 40 x 30 x 20 cm might seem easy to choose, but small differences in shape, padding and layout can determine whether it fits comfortably under the seat. The same applies if you’re flying with easyJet, Wizz Air, Vueling or another European airline.

Always check your airline’s current baggage rules before you travel. Size limits, weight restrictions and conditions for a personal item can change. Also check whether the backpack’s measurements are taken from the outside and include handles, front pockets and any protruding parts.

Three common mistakes when buying a Ryanair hand luggage backpack

1. The dimensions only work on paper

A bag might be advertised as 40 x 30 x 20 cm, but a bulging front pocket, rigid back or overfilled contents can make it larger. Soft backpacks in particular often end up roomier than expected when packed to capacity.

So, check:

  • The external dimensions, not just the capacity in litres.
  • The depth when the bag is fully packed.
  • Compression straps to help keep the bag within its intended shape.
  • The position of handles, wheels and front pockets.

An underseat backpack needs to fit within the stated dimensions and be practical to slide under a seat.

2. Lots of pockets, but not enough usable packing space

A bag with lots of small pockets might look organised, but leave little room for clothes or shoes. For a weekend trip, a spacious main compartment with a wide opening is often more useful than a long list of narrow pockets.

An opening that unzips wide, like a small suitcase, makes packing easier to organise. A separate front pocket is useful for your passport, phone and boarding pass. Also check whether the laptop compartment is well padded and doesn’t sit directly against the ground or the outside of the bag.

3. Lightweight material is mistaken for weak material

A lightweight travel backpack is handy at the airport and for commuting. However, low weight alone tells you nothing about the seams, zips or carrying comfort. Look for polyester or a similar fabric, reinforced seams, sturdy zips and padded shoulder straps.

“Water-repellent” doesn’t automatically mean waterproof, either. According to a brand’s product information, a coating can help repel light rain, but for prolonged rain it’s sensible to use a separate rain cover or waterproof packaging for electronics.

Which specifications matter?

Dimensions and capacity

For a 40 x 30 x 20 cabin backpack, the external dimensions are the first thing to check. A capacity of around 20 to 25 litres is often practical for clothes, toiletries and electronics on a short trip. According to the product information, the Kono backpack in this selection has a capacity of around 24 litres, weighs approximately 0.5 kg and measures 40 x 30 x 20 cm externally.

Allow for possible measurement variations. The manufacturer states that the internal dimensions of this model may vary by around 1 to 2 cm. So, don’t overfill the backpack until it bulges if you plan to use it as a personal item.

Laptop protection and organisation

For business travellers, students and commuters, a hand luggage backpack with a laptop compartment is more practical than an ordinary weekend bag. Check:

  • Whether the compartment fits your laptop.
  • Whether the laptop can move around against the outside of the bag.
  • Whether you can still reach the compartment when the main compartment is full.
  • Whether you can store documents, a charger and a power bank separately.

A travel backpack for a 15.6-inch laptop should ideally have a padded compartment. The laptop size doesn’t always match the computer’s external dimensions, so measure your device before you order.

Carrying comfort and everyday use

A backpack for short trips is often used as a work or school bag, too. Padded shoulder straps, a breathable back panel and a sturdy top handle are useful features. A trolley sleeve is handy if you want to secure the backpack to a suitcase’s handle.

Also consider the backpack’s own weight. A bag weighing 0.5 kg leaves more of your weight allowance for clothes. Of course, the final load depends on what you pack.

Recommendations by user type

Suitable for: Budget-conscious first-time buyers
Kono Ryanair Cabin Backpack 40x30x20cm

Kono Ryanair Cabin Backpack 40x30x20cm

Why it suits this type of user: This Ryanair personal item combines a fixed size with a layout suited to short trips, everyday use and commuting. According to the product information, it has room for around 24 litres and a laptop of up to 15.6 inches.

How this product avoids the pitfall

The stated external dimensions are 40 x 30 x 20 cm. Compression straps help keep the bag compact when the contents aren’t lying completely flat.

Key benefit and features

Around 0.5 kg, three compartments, a padded 15.6-inch laptop compartment and a wide-opening design.

Suitable for: Buyers looking for premium quality
Kono 40x30x20cm Expandable Cabin Bag

Kono 40x30x20cm Expandable Cabin Bag

Why it suits this type of user: This water-repellent travel bag is designed for people who want to carry work essentials, clothes and smaller damp items separately. The product name mentions a laptop compartment and wet-dry storage.

How this product avoids the pitfall

The tote shape means you don’t have to rely solely on small organiser pockets. Before buying, check the current dimensions when expanded and don’t fill the bag beyond the permitted size.

Key benefit and features

Measures 40 x 30 x 20 cm according to the product name, with a laptop compartment and separate wet-dry storage according to the listed specifications.

Suitable for: Specific uses and frequent users
Beneunder LC167 Lightweight Foldable Tote Bag

Beneunder LC167, Lightweight Foldable Tote Bag 140L

Why it suits this type of user: This isn’t an underseat backpack for Ryanair, but a foldable carry bag for moving house, long journeys or carrying bulky items. It’s suited to a different purpose from a personal item.

How this product avoids the pitfall

Its large capacity makes it clear that this product isn’t intended as a free personal item. That way, you can avoid buying a roomy bag that won’t fit under the seat.

Key benefit and features

According to the product information, it weighs around 398 grams, folds away and expands from 75 to a maximum of 140 litres.

Checklist before you order

  • Measure your laptop and compare its dimensions with those of the laptop compartment.
  • Check your airline’s current rules for personal items.
  • Check the external dimensions, including front pockets and handles.
  • Choose a padded back panel and padded shoulder straps if you’ll be carrying the bag for longer periods.
  • Use a waterproof cover for electronics in prolonged rain.
  • Check reviews and the returns policy, especially for bags with an expandable design.

Looking for more options?

We’ve put together a complete, up-to-date list of products that meet these strict selection criteria and the applicable European safety regulations.

Frequently asked questions

Will a Ryanair backpack measuring 40 x 30 x 20 cm always fit under the seat?

Not necessarily. The bag also needs to slide under the seat, taking its shape and how it’s packed into account. Check Ryanair’s current conditions and allow for protruding pockets, a bulging front and the contents.

Is 24 litres enough for a short trip?

For many travellers, around 24 litres is enough for a two- to three-day stay, depending on the clothes and shoes you take. Roll your clothes up compactly and use the pockets for smaller items. If you’re carrying lots of equipment or bulky clothes, you might need extra baggage.

How can I keep a hand luggage backpack in good condition for longer?

Wipe polyester with a soft, damp cloth and avoid harsh cleaning products. Let a wet bag air fully and don’t store it in direct sunlight for long periods. Don’t overload the zips and seams, as this can shorten the bag’s lifespan.