The general guidance is that cabin baggage should have a
maximum length of 56 cm, width of 45 cm and depth of 25 cm. These dimensions
include wheels, handles, side pockets, etc. Please check current in force
restrictions with your airline prior to travel.
MAXIMUM EXTERNAL DIMENSIONS
AND WEIGHT ALLOWED IN ECONOMY CLASS
AIRLINE MAX. DIMENSIONS MAX. WEIGHT
Aegean Airlines 56 x 45 x 25 cm 8 kg
Aer Lingus 55 x 40 x 24 cm 10 kg
Air Canada 55 x 40 x 23 cm 10 kg
Air France 55 x 35 x 25 cm 12 kg
Air India 55 x 40 x 20 cm 8 kg
Air New Zealand (max. 118 cm) 7 kg
Air Transat 51 x 40 x 23 cm 10 kg
Alitalia 55 x 35 x 25 cm 8 kg
American Airlines 56 x 36 x 23 cm (max. 115 cm)
Austrian Airlines 55 x 40 x 23 cm 8 kg
BMI 55 x 40 x 23 cm 12 kg
British Airways 56 x 45 x 25 cm 23 kg
Cathay Pacific 56 x 36 x 23 cm 7 kg
Delta Airlines 56 x 35 x 23 cm (max. 114 cm)
easyJet 56 x 45 x 25 cm
El Al 56 x 45 x 25 cm (max. 115 cm) 8 kg
Emirates 55 x 38 x 20 cm 7 kg
Etihad Airways 50 x 40 x 21 cm (max. 115 cm) 7 kg
Eurowings 55 x 40 x 23 cm 8 kg
Finnair 56 x 45 x 25 cm 8 kg
Flybe 55 x 35 x 20 cm 10 kg
Iberia 56 x 45 x 25 cm 10 kg
Jet2 56 x 45 x 25 cm 10 kg
KLM 55 x 35 x 25 cm (max. 115 cm) 12 kg
Lufthansa 55 x 40 x 23 cm 8 kg
Monarch 56 x 40 x 25 cm 10 kg
Qantas 56 x 36 x 23 cm (max. 115 cm) 7 kg
Qatar Airways 50 x 37 x 25 cm 7 kg
Ryanair 55 x 40 x 20 cm 10 kg
Scandinavian Airlines 55 x 40 x 23 cm 8 kg
Singapore Airlines (max. 115 cm) 7 kg
South African Airways 56 x 36 x 23 cm 8 kg
Swiss 55 x 40 x 23 cm 8 kg
Tap Air Portugal 55 x 40 x 20 cm (max. 115 cm) 8 kg
Thai Airways 56 x 45 x 25 cm 7 kg
Thomas Cook 55 x 40 x 20 cm 6 kg
Thomson 55 x 40 x 20 cm 5 kg
United Airlines 56 x 35 x 22 cm (max. 114 cm)
US Airways 56 x 36 x 23 cm (max. 115 cm)
Virgin Atlantic 56 x 36 x 23 cm 10 kg
AIRLINE MAX. DIMENSIONS MAX. WEIGHT
Aegean Airlines 56 x 45 x 25 cm 8 kg
Aer Lingus 55 x 40 x 24 cm 10 kg
Air Canada 55 x 40 x 23 cm 10 kg
Air France 55 x 35 x 25 cm 12 kg
Air India 55 x 40 x 20 cm 8 kg
Air New Zealand (max. 118 cm) 7 kg
Air Transat 51 x 40 x 23 cm 10 kg
Alitalia 55 x 35 x 25 cm 8 kg
American Airlines 56 x 36 x 23 cm (max. 115 cm)
Austrian Airlines 55 x 40 x 23 cm 8 kg
BMI 55 x 40 x 23 cm 12 kg
British Airways 56 x 45 x 25 cm 23 kg
Cathay Pacific 56 x 36 x 23 cm 7 kg
Delta Airlines 56 x 35 x 23 cm (max. 114 cm)
easyJet 56 x 45 x 25 cm
El Al 56 x 45 x 25 cm (max. 115 cm) 8 kg
Emirates 55 x 38 x 20 cm 7 kg
Etihad Airways 50 x 40 x 21 cm (max. 115 cm) 7 kg
Eurowings 55 x 40 x 23 cm 8 kg
Finnair 56 x 45 x 25 cm 8 kg
Flybe 55 x 35 x 20 cm 10 kg
Iberia 56 x 45 x 25 cm 10 kg
Jet2 56 x 45 x 25 cm 10 kg
KLM 55 x 35 x 25 cm (max. 115 cm) 12 kg
Lufthansa 55 x 40 x 23 cm 8 kg
Monarch 56 x 40 x 25 cm 10 kg
Qantas 56 x 36 x 23 cm (max. 115 cm) 7 kg
Qatar Airways 50 x 37 x 25 cm 7 kg
Ryanair 55 x 40 x 20 cm 10 kg
Scandinavian Airlines 55 x 40 x 23 cm 8 kg
Singapore Airlines (max. 115 cm) 7 kg
South African Airways 56 x 36 x 23 cm 8 kg
Swiss 55 x 40 x 23 cm 8 kg
Tap Air Portugal 55 x 40 x 20 cm (max. 115 cm) 8 kg
Thai Airways 56 x 45 x 25 cm 7 kg
Thomas Cook 55 x 40 x 20 cm 6 kg
Thomson 55 x 40 x 20 cm 5 kg
United Airlines 56 x 35 x 22 cm (max. 114 cm)
US Airways 56 x 36 x 23 cm (max. 115 cm)
Virgin Atlantic 56 x 36 x 23 cm 10 kg
Looks as if you want the best cabin allowance BA has it. I did double check on their website as I thought it looked as if it might to be mistake but it isn't. The only other thing that their website stated was " you must be able to lift it into the overhead locker by yourself."
Happy travels