• New Trip Updated: 2025.12.25

Suitcase Packing Tips by Size! | Maximizing the Use of S, M, and L Capacity

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"My belongings don't all fit," "The contents get jumbled up during travel"...these are common packing problems.

This problem can be solved simply by knowing the "packing strategy" that suits the size of your suitcase.

The storage priorities are completely different for the S size, which is used for a one-night business trip, and the L size, which is used for a long-term overseas trip.

This article will explain how to maximize the functionality of the NewTrip suitcase.

This article explains packing techniques based on luggage size, so you can pack smartly for any trip.

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目次

1. Packing Basics: The "Golden Rules" Applicable to All Sizes

2. [S size: 35-40L capacity] The ultimate "selection technique" for carrying luggage on board an airplane.

Tip 1: Compression bags are essential. They help reduce weight to meet the 7kg weight limit.

Tip 2: Gadget storage method that turns a front-opening case into a "mobile desk"

Tip 3: How to carry your shoes on a 1-night, 2-day business trip or a quick trip.

Tip 4: Manage all liquids together in a dedicated pouch.

3. [Medium Size: 60-70L Capacity] Smart Organization Techniques for 3-5 Night Trips

Tip 1: Use the left and right dividers separately for "on/off separation packing".

Tip 2: Utilize wet/dry separate pockets for toiletries and bathroom storage.

Tip 3: Roll pack your clothes by "outfit"

Tip 4: Include space for souvenirs on the way home.

4. [Large size: 90L capacity and up] "Stable packing" to support long-term and international travel.

Tip 1: Block out large spaces using "sorting cases".

Tip 2: The "clothing sandwich method" to protect fragile items and souvenirs.

Tip 3: Pack while using a digital scale.

Tip 4: Optimizing the center of gravity to support long-distance travel

Summary: Packing according to size makes travel more flexible.

FAQ（よくある質問）

一、パッキングの基本：全サイズの「共通ルール」

Regardless of the size, the following two points are the basics of packing that you should follow.

Heavy items should be placed on the "caster side," and lighter items on the "handle side."

When packing, the most important thing is the "center of gravity."

  • Caster side (bottom): Heavy items such as shoes, books, and toiletries.
  • Handle side (top): When light items such as clothing and towels are placed upright, the center of gravity is lower, which stabilizes the movement.
    Even large items weighing over 20kg can be carried easily and smoothly.

Those who master space control their packing (utilizing small items).

The movement of contents is the biggest cause of cargo shifting, wrinkles, and damage.

  • Use small items: Stuff rolled-up socks or hand towels into any empty spaces.
  • Cushioning effect: By eliminating gaps and creating a "single block," it protects the contents from impacts during transport.

■ 荷物デジタルはかり（LCCの重量制限もこれで安心）

Have you ever panicked at the airport counter because your luggage was overweight, especially when using a low-cost carrier (LCC)?

  • Check the weight with just one finger: Simply hook it onto the handle of your suitcase and lift it up to easily weigh it.
  • Ultra-lightweight and easy to carry: Because the unit itself is very light, you can slip it into your bag and adjust your packing on the spot if you buy too many souvenirs while traveling.
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二、【Sサイズ：容量35〜40L】機内持ち込みを極める「厳選術」

The themes for the S size are "efficiency" and "lightweight design".

The goal is to ensure a smooth transition through the airport while still meeting the 7kg carry-on baggage limit.

■ 「圧縮袋」は必須。7kg制限をクリアするための軽量化

When using an LCC (low-cost carrier),

Many airlines have strict restrictions on carry-on baggage, typically limiting it to a total of 7kg.

  • Minimize your clothing: Use compression bags to reduce the volume of your clothes to the absolute minimum. This keeps the "weight" of your clothes lighter by leaving room for extra space rather than forcing them into tight spaces.
  • A clever trick to meet the 7kg weight limit: Wear heavy coats and jackets with many pockets when boarding, and pack only light items in your suitcase.

■ フロントオープンを「移動するデスク」にするガジェット収納法

The front pocket, which is a strong point of the NewTrip's S-size models (such as 0501),

Let's use it not just as a small storage box, but as a "mobile office."

  • Order of access: Place your PC, tablet, and mobile battery—items you'll need to take out at security—in the "frontmost" pocket. You can pass through the gate smoothly without ever opening the main compartment at the back.
  • Ensure smooth cable management: By keeping your device and charger in your pocket, you can smartly charge and work while on the go at a cafe or waiting.

■ 1泊2日の出張や弾丸旅行での「靴」の持ち運び

Shoes are the item that creates the most "wasted space" when packing.

  • Storing inside shoes: If you absolutely need to change shoes, stuff rolled-up socks, a spare charging cable, and other small items inside your shoes to prevent them from losing their shape.
  • Arrangement tip: Place shoes in the corner on the caster side (bottom) with the bottom surface against the outer wall, using the shoes as a "wall" to pack other items tightly without leaving any gaps.

■ 「液体類」は専用ポーチで一括管理

There is an international rule for carry-on luggage that states "items must be in containers of 100ml or less and packed in a clear zipper bag of 1L or less."

  • Place it at the top: Place the bag containing liquids on top of the front pocket or main compartment as the last step in packing.
  • NewTrip's wet/dry separation pocket: By utilizing the waterproof pocket inside the main compartment, you can carry your bag with peace of mind, knowing that even if a liquid leaks, you don't have to worry about soiling other clothes.
S-SIZE LINEUP
NewTrip Sサイズ一覧

【機内持ち込み】New Trip Sサイズ スーツケース一覧

パッキング効率を左右するフロントオープン搭載モデルから、7kg制限を意識した超軽量モデルまで。最短翌日お届け可能なNewTripのSサイズラインナップをすべてチェック。

Sサイズの商品をすべて見る
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三、【Mサイズ：容量60〜70L】3〜5泊を賢くこなす「整理術」

While the medium size is the most versatile, the downside is that items tend to get mixed up inside.

The key point of this article is to delve into specific techniques for making 3-5 night trips more comfortable.

■ 左右の仕切りを使い分ける「オン・オフ分離パッキング」

When you open your suitcase, the correct way to choose a medium-sized one is to completely separate the "roles" of the left and right sides.

  • Left side (lid side): Place "spare clothes" that you won't be using immediately or "things you won't take out until you get home" here.
  • Right side (bottom of the unit): Place your daily skincare products, pajamas, and underwear here.
    By separating items by purpose in this way, you can avoid the stress of rummaging through your belongings at your accommodation wondering, "Where is that item?"

■ 乾湿分離ポケットを活用した洗面具・水回り収納

Make full use of the "wet/dry separation pocket" that is included in many NewTrip products.

  • Isolating wet items: Store used face towels, toothbrushes, or folding umbrellas that got wet in a sudden downpour.
  • Leakage prevention: Store skincare products such as lotions and shampoos in this waterproof pocket to protect against accidental leaks and minimize the risk of staining other clothing.

■ 着替えを「コーディネートごと」にまとめるロールパッキング

Because the amount of clothing increases with size M

Instead of listing items individually (T-shirts, pants, etc.), they are labeled as "Day 1 Set," "Day 2 Set," and so on.

I roll up each outfit and pack them.

  • Benefit 1: By arranging them upright, you can find the clothes you want to wear the moment you open the case.
  • Benefit 2: It's less likely to wrinkle than folding, and you can pack it in without leaving any gaps.

■ 帰りのお土産スペースも計算に入れる

A common mistake when choosing a size M is that "it fits perfectly on the way there, but won't close on the way back."

When packing, either set aside a space for souvenirs on one side of your suitcase beforehand,

I chose the New Trip model with expandable functionality.

It's wise to ensure you have 20% more storage space available for the return trip.

M-SIZE LINEUP
NewTrip Mサイズ一覧

【4〜6泊向け】New Trip Mサイズ スーツケース一覧

一番人気のMサイズは、カラーや機能も豊富。帰りのお土産に対応する拡張機能付きや、深夜移動も安心の静音キャスターモデルなど、あなたのパッキングスタイルに最適な一台が見つかります。

Mサイズの商品をすべて見る
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四、【Lサイズ：容量90L〜】長期・海外旅行を支える「安定パッキング」

Image: https://health-note-hu.net/2024/06/14/tips-packing-fragile-items-suitcase/

The themes for the large size are "weight balance" and "block management".

With a large capacity of over 90L, if you pack it incorrectly, your belongings may scatter inside during transport.

There is a risk that the casters may break due to uneven weight distribution.

■ 広い空間を「仕分けケース」でブロック化。

Because the large size has a spacious interior, if you put your belongings in as they are, you won't be able to see what's at the bottom.

  • Tips for creating blocks: Create "blocks" for each category using mesh travel pouches that allow you to see the contents, such as "clothing," "toiletries," "electronic devices," and "emergency food."
  • Arrange them like Tetris: By separating them into pouches, you can quickly find only the blocks you need, even if your luggage is piled up in your suitcase.

■ 割れ物・お土産を死守する「衣類サンドイッチ法」

When traveling abroad, there are more opportunities to bring back items such as wine, cosmetics, and fragile sweets.

  • Place in the center: Place heavy liquids and fragile items in the "center" of your suitcase.
  • Sandwiching with clothing: By surrounding the contents with blocks of clothing on all sides, you create a cushioning layer to protect them from the harsh impacts during check-in. The golden rule is to prevent direct contact with the outer wall.

■ 重量デジタルはかりを使いながらのパッキング

The scariest thing about large-sized luggage is exceeding the weight limit at the airport counter.

  • The 20kg limit: Many international flights allow up to 23kg per bag. Once you're about 80% done packing, weigh your luggage with a digital scale .
  • Adjustment flexibility: You can decide on the spot if there's room for the "heavy souvenirs" you plan to pack last. This prevents the embarrassment of having to open your case at the airport.

■ 長期移動を支える「重心の最適化」

Because the L size is heavier overall, if the center of gravity is disrupted, the driving performance will drop significantly.

  • Ensure stability at the bottom: Following the aforementioned golden rule, place the heaviest items on the caster side.
  • Using the caster stopper: The heavy L size will roll away on its own even on a slight incline. By frequently turning on the NewTrip's stopper function while packing or moving, you can prevent unexpected tipping and accidents.
L-SIZE LINEUP
NewTrip Lサイズ一覧

【長期・海外旅行】New Trip Lサイズ スーツケース一覧

158cmルールをクリアした大容量モデルを多数ラインナップ。強固なアルミフレームから、自重を極限まで抑えた軽量ジッパータイプまで、過酷な海外旅行でも頼れる相棒をサイズ一覧からお選びください。

Lサイズの商品をすべて見る
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まとめ：サイズに合わせたパッキングで旅はもっと自由になる

A suitcase is not just a "container," but a base for your journey.

  • The S size allows you to travel light with carefully selected belongings.
  • The M size allows you to keep things organized by using it on both the left and right sides.
  • The large size helps avoid problems with block storage and weight management.

By combining the characteristics of each size with the functions of NewTrip,

From departure to return, your trip should be smarter and more comfortable.

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FAQ（よくある質問）

Q1. 衣類は「畳む」のと「丸める」の、どちらが効率的ですか？

A1：基本的には「丸める（ロールパッキング）」の方が効率的です。隙間なく詰められ、シワにもなりにくいのがメリットです。ただし、ジャケットやシャツなど型崩れさせたくないものは、丁寧に畳んで一番上に置くか、ガーメントバッグを利用しましょう。

Q2. お土産が増えて入り切らなくなった時の対処法は？

A2：New Tripの「拡張機能（エキスパンダブル）」搭載モデルなら、ファスナーを開くだけで容量を増やせます。拡張機能がない場合は、衣類をさらに圧縮し、重いお土産をスーツケースへ、軽い衣類をサブバッグ（折りたたみバッグ）に移して機内に持ち込むのがコツです。

Q3. パッキングしても中身が動いてしまうのですが…

A3：空間が余っている場合は、New Tripのスーツケースに備え付けのクロスベルトを最大限に活用してください。それでも隙間ができるなら、バスタオルや新聞紙を詰める、あるいはトラベルポーチを縦に並べて「壁」を作ることで、移動中の荷崩れを防止できます。

Q4. 重いものを下（キャスター側）に置くのは、壊れる原因になりませんか？

A4：いいえ、むしろ逆です。下に重いものを置くことで走行が安定し、キャスターへの不規則な衝撃を抑えることができます。New Tripのダブルキャスターは高荷重に耐える設計ですので、正しい重心バランスでパッキングする方がキャスターの寿命を延ばすことにも繋がります。

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