The Singapore Airlines Carry On Dimensions are the first thing to check if you plan to travel with cabin luggage. A bag that meets the rules goes on board with you. A bag that is too large or too heavy may be stored in the hold, which can mean delays and extra charges. This guide explains the size limit, the weight limit, the allowance for each cabin class, personal item rules, and what happens if your bag goes over.
Carry On Size Limit
Singapore Airlines measures cabin bags by total linear dimensions rather than by fixed length, width, and height. Add the three together, and the sum should not exceed 115 cm (45 inches). The measurement includes handles, wheels, and outer pockets.
Many travelers use roughly 55 x 40 x 20 cm as a practical guide, but any bag whose three sides add up to 115 cm or less meets the rule. Measure your bag fully packed, because an overstuffed case can bulge beyond its labeled size.
Carry On Weight Limit
The standard cabin weight limit is 7 kg per piece. This covers the bag itself plus everything inside it. A heavy hard-shell case can use up much of this limit before you pack anything, so a lightweight suitcase gives you more room for belongings. Weigh the bag at home on a luggage scale once it is fully packed.
Cabin Baggage Allowance by Travel Class
The number of cabin bags depends on your cabin class:
- Economy and Premium Economy: one cabin bag up to 7 kg, plus one personal item.
- Business Class: two cabin bags up to 7 kg each, plus one personal item.
- First Class and Suites: two cabin bags up to 7 kg each, plus one personal item.
Each piece must meet both the size and the weight requirement. The weight limit applies to each piece separately, so you cannot combine the allowance into one heavier bag.
Personal Item Rules
A personal item is a small extra bag, such as a handbag, laptop bag, or small backpack. It is allowed in addition to your cabin bag and generally needs to fit under the seat in front of you. Third-party guides often list a size of around 40 x 30 x 10 cm for Economy, but a precise figure is not always published, so keep it compact and check the official website for current guidance.
What to Keep in Your Cabin Bag
Keep these items with you rather than in the hold:
- Passport, visas, and travel documents
- Prescription medication
- Wallet, cash, and bank cards
- Phone, laptop, and chargers
- Spare lithium batteries and power banks
- Jewelry and other valuables
Security Rules for Cabin Bags
Liquids, gels, and aerosols in hand luggage are generally limited to small containers carried in a clear resealable bag, so larger quantities belong in checked baggage. Spare lithium batteries and power banks usually must travel in the cabin, not in the hold. Knives, scissors, and similar tools are normally banned from the cabin. Rules can differ by country, so check the regulations at your departure and arrival airports.
If Your Bag Is Too Big or Too Heavy
If your cabin baggage exceeds the limits, it may be collected and stored in the aircraft cargo compartment. You may also pay additional baggage charges if the combined weight or number of pieces goes beyond your free allowance. This usually happens at check-in or at the boarding gate, which is a stressful place to repack.
Quick Tips to Stay Within the Limits
- Measure your bag with wheels and handles, and add the three sides together.
- Weigh the bag fully packed, not empty.
- Choose a lightweight case to leave more of the 7 kg for your belongings.
- Wear your heaviest clothing on board.
- Leave a little spare weight for souvenirs on the way home.
Conclusion
Singapore Airlines Carry On Dimensions come down to four checks: a total size of 115 cm or less, a weight of 7 kg per piece, the right number of pieces for your cabin class, and a small personal item that fits under the seat. Because airline policies, fares, and routes can change, always confirm the latest details on the official Singapore Airlines website or with customer service before you fly.
