Update date: 2026.02.02

A thorough comparison of carry-on baggage regulations for overseas airlines! Pitfalls and solutions for Qatar Airways and other airlines

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Do you think, "Since it can be used on domestic flights with ANA or JAL, it will be fine for overseas travel too?"

In fact, there are surprisingly many airlines around the world that have stricter rules than the standard Japanese size (55 x 40 x 25cm).

Just the other day, we received a desperate inquiry from a customer who said, "The case I have is a few centimeters short of Qatar Airways' regulations (height limit of 50cm)."

To avoid the trouble of being suddenly told at the airport counter that you cannot bring something with you and having to pay a large additional fee, we will organize and explain the ``unexpected pitfalls'' of overseas airlines as of 2026.

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table of contents

1. Three types of "strict" size restrictions on overseas airlines

・Height restrictions are extremely strict (50cm or less)

- Strict restrictions on width and thickness (slim/thin designation)

・"Ultra-small" designation (free quota for LCCs)

2. Choosing a suitcase to avoid mistakes when traveling abroad

・Lightness is the key to successful carry-on luggage

・"Universal size" or "Specialized size"

3. How well does the New Trip carry-on model work with international airlines?

・A model that meets the 23cm thickness limit on European routes

・Note: In the case of flights with a height restriction of 50cm (such as Qatar Airways),

4. Summary: Make smart choices and improve the quality of your travels

5. FAQs about carry-on luggage size

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一、海外航空会社の「厳しい」サイズ制限：3つのパターン

Based on Japan's standard carry-on size (55 x 40 x 25cm), there are broadly three "restriction patterns" among overseas airlines.

1. 高さ制限が極めて厳しい（50cm以下）

The group that you need to be most careful of is the one where the height regulations are 5cm shorter than in Japan. A typical "20-inch" suitcase (approximately 55cm tall) cannot be carried on board airlines in this group.

  • Qatar Airways: 50 x 37 x 25cm
    This is also narrower than a typical 20-inch suitcase, so your options are limited.
  • Etihad Airways: 50 x 40 x 25 cm
    There is a little more space than with Qatar Airways, but you still need to be careful about the width .
  • Etihad Airways: 50 x 40 x 25 cm
  • Aer Lingus: 48 x 33 x 20 cm
    This is a fairly strict restriction, requiring an 18-inch suitcase.

2. 幅・厚みの制限が厳しい（スリム・薄型指定）

Even if the height of the bag is 55cm, it may get stuck due to width or depth (thickness). This is a common problem with European and Chinese airlines.

  • Air France / KLM: 55 x 35 x 25 cm
    The width is 5cm narrower than the standard in Japan (55 x 40 x 25 cm), so you should pay particular attention to the width of your suitcase.
  • Emirates: 55x 38 x 20 cm
    The thickness is 20cm, which is very tight. If you don't choose a suitcase that is thinner and lighter than usual, your luggage may not fit inside.
  • Lufthansa: 55 x 40 x 23 cm
    Although it is only 2cm different from the suitcase size used in Japan (55 x 40 x 25 cm), you should be careful as your luggage may not fit inside .
  • Air China/Southern Airlines: 55 x 40 x 20 cm
    It is 5cm thinner at 20cm , so it may be a bit difficult for people who tend to carry bulky luggage.

3. 「超小型」指定（LCCの無料枠）

It is "personal baggage" size and must be placed under the seat in front of you, not in the carry-on compartment.

Increasingly, this size is the only thing included in the basic fare of low-cost airline tickets.

  • Ryanair: 40 x 20 x 25 cm
    It's quite compact. While many people tend to rely on 20-inch cases, this airline requires smaller suitcases .
  • easyJet: 45 x 36 x 20 cm
    It is 20cm thick and needs to be packed quite tightly, so this model is especially suitable for travelers who don't carry much luggage.
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二、海外旅行で失敗しないためのスーツケース選び

In order to travel comfortably while meeting the airline's strict regulations, there are two other important points to check besides size.

1. 「軽さ」が機内持ち込み成功のカギ

Foreign airlines, especially Qatar Airways and LCCs (low-cost carriers), have very strict not only size but also weight restrictions (generally around 7kg).

  • It's a disadvantage if the case itself is heavy: If the suitcase itself weighs 3.5 kg, you can only fit 3.5 kg of contents inside.
  • Advantages of ultra-lightweight models: Ultra-lightweight models weighing around 2kg allow you to pack more souvenirs and extra clothes.

To avoid the hassle of having to unpack your luggage at the airport because it's overweight, make lightness your number one priority when choosing carry-on luggage.

2. 「万能サイズ」か「特化サイズ」か

  • Reliable compact size: If you frequently fly on demanding routes such as Qatar Airways, you should start with a model that is less than 50cm tall, or a slightly smaller "SS size (18 inches)" model, so you won't have to worry about which airline to use.
  • Expandable functions for different uses: Models with expandable functions, such as those that are compact for everyday use and expandable for domestic flights or routes with looser size regulations, are extremely convenient as they can accommodate the rules of multiple routes with just one device.
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三、New Tripの機内持ち込みモデル、海外航空会社での対応力は？

We answer the question, "Can New Trip suitcases be used overseas even in countries with strict travel restrictions?"

The conclusion is that " it is possible to travel on many European routes, but you need to be careful of special restrictions such as those of Qatar Airways ."

1. ヨーロッパ路線の「厚み23cm」制限をクリアするモデル

Lufthansa and other airlines have a size limit of 55 x 40 x 23cm . The S-size model below fits perfectly into this limit, being slightly thinner than the Japanese standard (25cm).

  • New Trip 0201 (S size)
    ・Size: 36 x 23 x 55cm
    ・Features: With a depth of 23cm , which is within regulations, it fits easily into size-checking equipment. It can be used flexibly, such as carrying it on the way there, and then using the "expansion function" to increase the capacity and turn it into checked luggage on the way back when you've added more souvenirs to your luggage.
ULTRA LIGHTWEIGHT & EXPANDABLE
NewTrip 0201

NewTrip 0201【超軽量・容量拡張機能・TSAロック】

ABS+PCの混合素材を採用し、移動の負担を減らす「超軽量」を実現。さらに、ファスナー一つでマチが広がる拡張機能を搭載。お土産で荷物が増えても安心の、まさに「旅の基本」を極めた一台です。

0201の詳細を見る
  • New Trip 0301 (S size)
    ・Size: 37 x 23 x 54cm
    Features: This bag also meets international regulations at 23cm thick. It also comes fully equipped with features to significantly reduce the stress of traveling abroad, including a USB port for when you're waiting for a long flight, hooks for hanging your carry-on luggage, and caster stoppers , which are essential for traveling by train.
Multi-Function & Stopper
NewTrip 0301

NewTrip 0301【USBポート・ストッパー付】

奥行き23cmで海外航空会社の規定にも対応しやすく、旅の「欲しい」をすべて詰め込んだ一台。ストッパーやUSBポート、物掛けフックを搭載し、慣れない土地での移動をスマートにサポートします。

  • 電車・バスで便利なキャスターストッパー搭載
  • 移動中も安心。USB充電ポート＆物掛けフック
  • 奥行23cm設計。欧州航空会社の規定にも最適
  • 3段調節キャリーバー＆安全なダイヤル式TSAロック
0301の詳細を見る

2 注意点：高さ50cm制限（カタール航空など）の場合

To be honest, New Trip's current small size lineup (approximately 54-55cm tall) does not meet the 50cm height restriction of Qatar Airways or Atihad Airways.

  • Solution: If you are flying with one of these airlines, we recommend that you do not try to carry it on board, but rather use it as checked baggage . The New Trip case is highly durable, so you can use it safely even in checked baggage.
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まとめ：チケットを買ったら「Baggage」の確認を！

As of 2026, airline size regulations are more granular than ever before.

  • Domestic and general international flights: Most New Trip S sizes are compatible
  • European routes (thickness restrictions apply): Size S (23cm thick) of 0201 or 0301 is best
  • Qatar Airways, etc. (height limit: 50cm): New Trip S size baggage must be checked in

It's a wonderful trip.

To avoid panicking at the airport counter, check the latest regulations of your airline and choose the best "buddy" for you.

Title

機内持ち込みサイズに関するFAQ

Q1. カタール航空など、高さ50cm以下の制限にNew TripのSサイズは対応していますか？

A1：残念ながら、現在のNew Trip Sサイズ（高さ約54〜55cm）は、高さ50cm制限のある路線（カタール航空、アティハド航空など）の機内持ち込み規定には適合しません。 これらの路線をご利用の際は、無理に持ち込もうとせず「受託手荷物（預け入れ）」としてご利用ください。TSAロック標準装備のため、預け入れでも安心です。

Q2. ヨーロッパ路線の「厚み23cm制限」におすすめのモデルはどれですか？

A2：New Trip 0201（Sサイズ）または0301（Sサイズ）が最適です。どちらも奥行き（厚み）がジャスト23cmに設計されており、ルフトハンザ航空などの厳しいサイズチェックもスムーズにクリアしやすい仕様です。 特に0301はUSBポートやストッパー付きで、海外での移動をより快適にします。

Q3. キャスターやハンドルもサイズ規定に含まれますか？

A3：はい、すべて含まれます。航空会社の規定するサイズは「外寸（総外寸）」を指し、キャスターや持ち手などの突起物を含んだ数値です。 New Tripの表記サイズはこれらを含めた総外寸ですので、公式サイトの規定数値とそのまま比較して判断いただけます。

Q4. 海外便の「重量7kg制限」をクリアするコツは？

A4：「本体の軽さ」を最優先に選ぶことです。ケース自体が3kg以上あると、中身は4kgしか入れられません。 New Trip 0201のような超軽量設計モデルを選び、パッキング時は圧縮袋などを活用して効率的に重量を分散させましょう。空港の秤で事前にセルフチェックする習慣も大切です。

Q5. 拡張機能付きスーツケースは機内持ち込みOKですか？

A5：拡張ファスナーを閉じた状態（非拡張時）であれば、多くの航空会社で持ち込み可能です。ただし、拡張して厚みが規定を超えた場合は、預け入れ荷物扱いとなります。 「行きは機内持ち込み、帰りはお土産が増えたので拡張して預け入れ」といった柔軟な使い方ができるのがNew Trip 0201の強みです。

Q6. 海外旅行でスーツケースが壊れないか心配です。

A6：海外の空港では荷物の取り扱いが荒いこともありますが、New Tripの製品は第三者機関による厳しい落下試験や走行試験をクリアしています。 万が一の際も、TSAロックやコーナーパッド（1101など）が大切な荷物を守ります。信頼できる「自分専用」を持つことで、移動の不安を最小限に抑えられます。

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