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Choosing a Ryanair 40x30x20 cm backpack: a practical guide to cabin baggage

A Ryanair 40x30x20 cm backpack may seem easy to find, but small differences in size, layout and comfort can make all the difference to how well your bag works during a flight. A bag may be within the limit on paper, yet still be difficult to fit under the seat because of a rounded front or overfilled pockets.

If you’re travelling from the Netherlands on a short break, business trip or weekend away, there are three main pitfalls to watch out for.

Common pitfalls when choosing a 40x30x20 cm cabin backpack

1. Looking only at the external dimensions

The dimensions 40 x 30 x 20 cm are usually measured on the outside. Handles, zips, side pockets and soft sections can all affect the overall size. The Kono model’s product information states that the internal dimensions may differ from the external dimensions by around 1 to 2 cm.

So don’t just look at the stated capacity; check how full you can pack the bag, too. A 24-litre backpack can be practical, but it may be harder to fit under the seat when packed to the brim.

2. Confusing “waterproof” with water-resistant

Many cabin backpacks are made from polyester with a water-resistant finish. This can help protect against light rain or spills, but it doesn’t automatically make the bag fully waterproof. According to the product description, the Kono material is water-resistant, so the bag isn’t intended to replace a waterproof cover in prolonged rain.

Also check the zips and seams. Water can still get in through these, even if the outer fabric helps repel moisture.

3. Choosing a laptop compartment without enough protection

A laptop compartment isn’t automatically well protected. Check for padding, where the compartment is positioned and how the laptop is secured. A 15.6-inch laptop backpack should also have enough room for your laptop without putting strain on the zip.

For air travel, a separate tech compartment is handy, as it makes your laptop and tablet quicker to access at security.

Which specifications matter?

Dimensions and fitting under the seat

An underseat backpack needs to be compact enough to take on board as a personal item. Ryanair generally allows a free personal item measuring up to 40 x 30 x 20 cm, but airline rules can change. Always check the airline’s current baggage rules and the details of your booking.

A good 40x30x20 cm cabin backpack should ideally have:

  • a flexible, not overly rigid construction;
  • compression straps to limit its depth;
  • a shape that doesn’t bulge unnecessarily;
  • a handle to help you place it under the seat;
  • clear dimensions in centimetres, not just a capacity in litres.

According to the product information, the Kono Ryanair Cabin Backpack measures 40 x 30 x 20 cm externally. The manufacturer also says the bag is designed to fit under a seat or in an overhead locker. Treat this as product information and check your airline’s current requirements.

Weight and usable capacity

A lightweight travel backpack leaves more room for clothes, toiletries and electronics within the permitted weight allowance. According to the product description, the Kono model weighs around 0.5 kg and has a stated capacity of approximately 24 litres.

For a backpack for short trips, a capacity of around 20 to 25 litres is often practical. For two or three days, you could pack:

  • two or three tops;
  • one pair of trousers or a skirt;
  • underwear and socks;
  • a thin jumper;
  • travel-sized toiletries;
  • a charger and power bank;
  • compact shoes, if needed.

Heavy shoes, books and multiple electronic devices can quickly add weight. A lightweight bag means the backpack itself won’t weigh more than necessary when empty, but you should still check the total weight.

Organisation and everyday use

A business travel backpack or commuter bag works better when you don’t have to pile everything into one large compartment. Look for:

  • a front pocket for your passport, phone and tickets;
  • a main compartment that opens wide;
  • a padded laptop or tablet compartment;
  • a separate pocket for small accessories;
  • a pass-through for a charging cable;
  • a trolley sleeve for use with a suitcase.

According to the product description, the Kono backpack has three main compartments. The middle compartment opens like a small suitcase and includes a mesh pocket, slip pockets and space for a power bank. This makes the bag suitable as a Ryanair personal item, as well as a student backpack or everyday commuter bag.

Our recommendations by user type

Suitable for: Budget-conscious beginners
Kono 40x30x20cm Expandable Cabin Bag

Kono 40x30x20cm Expandable Cabin Bag

Why it suits this user type: This compact cabin bag is a good choice if you’re looking for your first personal item for a flight and also want a bag for weekend breaks or business trips. The laptop sleeve and wet/dry storage provide practical organisation without the need to take an extra bag.

How this product helps avoid the pitfall

The stated dimensions are clearly listed as 40 x 30 x 20 cm. Be sure to check the bag’s size once packed and bear Ryanair’s current rules in mind.

Key benefit & highlights

Laptop sleeve, wet/dry storage and an expandable design, according to the product name and product information.

Suitable for: Shoppers looking for top quality
Kono Ryanair Cabin Backpack 40x30x20cm

Kono Ryanair Cabin Backpack 40x30x20cm

Why it suits this user type: This model is a good fit if you want one bag for short flights, commuting and carrying a laptop. According to the product description, the backpack has a padded compartment for a laptop up to 15.6 inches and a capacity of around 24 litres.

How this product helps avoid the pitfall

The bag has a stated weight of 0.5 kg and compression straps. These help you pack more compactly, although how you pack it will still determine whether it fits under the seat.

Key benefit & highlights

Three compartments, a 15.6-inch laptop compartment, padded shoulder straps and a breathable back panel, according to the product information.

Suitable for: Specific needs & frequent use
Kono 40x30x20cm Expandable Cabin Bag Black

Kono 40x30x20cm Expandable Cabin Bag, Black

Why it suits this user type: Its expandable design and business-friendly layout are handy for frequent short trips, meetings away from the office and journeys where you need to keep clothes and electronics separate.

How this product helps avoid the pitfall

The bag has separate storage compartments, rather than one cluttered main compartment. If you use it frequently, keep an eye on the zips, seams and how full you pack it.

Key benefit & highlights

Laptop sleeve, water-resistant polyester and an expandable design, according to the product information.

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 about a Ryanair 40x30x20 cm backpack

Will a 40x30x20 cm backpack always fit under the seat?

Not always. The bag needs to slide under the seat when it’s packed, too. Rounded edges, a bulging front pocket or too many clothes can increase its practical dimensions. Measure the outside of the packed bag and check Ryanair’s current rules before you travel.

How much clothing will a cabin backpack hold for two or three days?

That depends on the season and how you pack. With lightweight clothes, travel-sized toiletries and perhaps the chance to do some washing while you’re away, a backpack of around 20 to 24 litres is often enough for a short trip. Thick jumpers and extra shoes take up a lot of space.

Is a water-resistant backpack suitable for everyday use in the Netherlands?

Water-resistant polyester can be practical for commuting and light rain. For prolonged or heavy rain, it’s best to use extra protection, such as a rain cover or a waterproof cover for your laptop and documents. After use, check the zips and let the bag dry completely before putting it away.