Not sure which suitcase size to go for? This quick guide to the 4 standard sizes explains when each one makes the most sense – depending on your travel duration and whether you need carry-on or checked luggage. It also covers the 158 cm (62 inch) rule and answers to the most common questions. If anything’s still unclear, feel free to ask in the comments.
Contents
- 1 Suitcase size guide
- 2 An overview of the suitcase sizes
- 3 158 cm rule for checked luggage
- 4 FAQ
- 4.1 What is the size of a 23kg luggage bag?
- 4.2 What size of suitcase do I need for 1 week?
- 4.3 What size of suitcase do I need for 2 weeks?
- 4.4 Is a carry-on enough for 2 weeks?
- 4.5 What suitcase size is allowed as checked baggage?
- 4.6 What size suitcase is a carry-on?
- 4.7 Is a 24-inch suitcase allowed as hand luggage?
- 4.8 What is the maximum weight for a suitcase on an airplane?
About the author
My name is Sebastian, and I’ve been specialising in luggage since 2017. I test products, give honest advice, and help travellers find the best suitcases.
Suitcase size guide
There are 4 average suitcase sizes:
Because suitcase sizes aren’t standardised, I compared the dimensions of the most popular models to determine average values. The sizes provided are meant as a guide and may vary slightly.
When selecting the right suitcase size, consider whether you’re a minimalist traveller or prefer to pack a little extra for added comfort.
An overview of the suitcase sizes
Average use of the different sizes
Size S – carry-on suitcase
The suitcase size S is ideal for short trips of up to 3 days. Personally, I use this size for summer trips of up to 5 days, paired with a backpack for extra storage. Suitcases of this size are permitted as carry-on luggage by most airlines, making them a popular choice for travellers.
This is why size S is often referred to as hand luggage. However, the allowed dimensions can vary between airlines and are typically around 55x40x20 cm.
Size M – small checked luggage
The suitcase size M is commonly referred to as small checked luggage. Suitcases in this category must be checked in when travelling by plane. This size is ideal for trips of around one week. For minimalists or trips requiring less luggage, such as a beach holiday, a size M suitcase can even suffice for up to two weeks.
Size L – large checked luggage
The suitcase size L also needs to be checked in when travelling by plane. This size is perfect for trips of around two weeks. Depending on your travel style and the type of trip, a size L suitcase can comfortably accommodate luggage for up to three weeks or even longer.
Size XL – extra large suitcase
The suitcase size XL is ideal for longer trips of 2 to 3 weeks. However, for air travel, this size is only partially suitable. Most airlines consider it oversized, meaning it cannot be checked in as standard luggage. Instead, it is classified as bulky luggage, which may incur additional fees.
For more details on size limits and airline policies, see: 62 inch Luggage.
158 cm rule for checked luggage
62-Inch luggage explained
The 158 cm rule is a common suitcase size limit for checked luggage used by many international airlines. It refers to the total dimensions of your suitcase – length + width + height – which must not exceed 158 cm (or 62 inches). Both measurements are equivalent, but 158 cm is the standard most often used in the UK and Europe. Airlines apply this rule to ensure that suitcases fit easily into the aircraft’s hold and can be handled efficiently.
158 cm rule – how to measure your luggage
Width + height + length (including wheels and handles) = max. 158 cm (62 inches)
The maximum permitted suitcase size varies between airlines, so it’s essential to check the specific regulations of your airline before you travel.
Calculating suitcase size – an example
Let’s say you’re looking for the largest possible suitcase and have decided on my top pick, the Samsonite Neopulse. To comply with the 158 cm rule, you’re torn between sizes L and XL. The two models have the following dimensions:
Size L (75) measures 75x51x28 cm. The combined dimensions are:
30 + 20 + 11 = 61 in (75 + 51 + 28 = 154 cm)
Size XL (81) measures 81x54x30 cm. The combined dimensions are:
32 + 21 + 12 = 65 in (81 + 54 + 30 = 165 cm)
Result: While the size L meets airline regulations for checked luggage, the size XL is slightly larger and could be classified as oversized baggage, potentially incurring additional fees.
Important: Always include wheels and handles when measuring your suitcase!
FAQ
Frequently asked questions about suitcase sizes
What is the size of a 23kg luggage bag?
A medium (M) suitcase with a capacity of 50–80 litres or a large (L) suitcase with 80–100 litres is typically suitable for 23kg of luggage. The right size depends on what you’re packing – lots of light items or fewer heavier ones. For trips of 2 to 3 weeks where you want to make full use of the 23kg allowance, I’d recommend going for a large suitcase (Size L).
What size of suitcase do I need for 1 week?
For a one-week trip, a medium (M) suitcase is usually the right choice. This size typically offers around 50 to 80 litres of packing space. If you’re travelling with bulkier items – for example, on a winter holiday – a large (L) suitcase with 80 to 100 litres may be a better option.
What size of suitcase do I need for 2 weeks?
For a two-week trip, a large (L) suitcase is usually the best option. This size typically holds around 80 to 100 litres. Even larger suitcases often exceed the 158 cm size limit set by many airlines and may incur additional charges when checked in.
Is a carry-on enough for 2 weeks?
In most cases, no. A carry-on suitcase is generally designed for short trips of up to 3 to 5 days. It might be enough if you travel very light and have the option to do laundry at your destination – but for a two-week trip, a larger checked bag is usually the better choice.
What suitcase size is allowed as checked baggage?
Most airlines allow checked baggage with a total size of up to 158 cm (height + width + depth). This typically corresponds to a medium (M) or large (L) suitcase. Anything larger is usually considered oversized and may incur extra fees. It’s best to check the exact limits with your airline, as rules can vary slightly.
What size suitcase is a carry-on?
In general, size S is considered suitable for carry-on luggage. However, there’s no universal rule – each airline sets its own size and weight limits for cabin bags. As a rough guide, the unofficial standard is 55 x 40 x 20 cm, which is accepted by most airlines.
For exact dimensions by airline, check out my detailed guide to hand luggage sizes.
Is a 24-inch suitcase allowed as hand luggage?
In most cases, no. A 24-inch suitcase usually exceeds the maximum size for carry-on luggage allowed by most airlines. Standard cabin bags are generally limited to around 55x40x20 cm, which is roughly 21–22 inches. A 24-inch case is usually better suited as checked baggage.
What is the maximum weight for a suitcase on an airplane?
There are no universal rules for how much a suitcase can weigh – it depends on the airline and the fare you’ve booked. However, here are some general guidelines:
- Checked luggage must not exceed 32 kg. Anything heavier usually has to be shipped as cargo.
- Most airlines allow 20 to 23 kg for checked baggage in standard fares. Up to 32 kg may be permitted in higher-priced fare classes.
- Hand luggage typically has a weight limit of 6 to 10 kg, depending on the airline.
