TK operates the following adult checked (hold) baggage allowances:
Domestic flights:
Economy: 20kg
Business: 30kg
Unlimited pieces not exceeding total limit above.
International flights:
Economy: 20kg
Comfort: 20kg
Business: 30kg
Unlimited pieces not exceeding total limit above.
Flights originating/terminating in North and South America, Nigeria and Senegal:
Economy: 2 pieces not exceeding 23kg each
Comfort: 2 pieces not exceeding 23kg each
Business: 2 pieces not exceeding 32kg each
Star Alliance Gold customers get 20kg extra or one piece extra in all service classes.
Details including infant rules are
here
Hand (cabin) luggage:
Economy: 1 piece, max weight 8kg, max dimensions 23x40x55 cm
Comfort: 1 piece, max weight 8kg, max dimensions 23x40x55 cm
Business: 2 pieces, max weight 8kg each, max dimensions 23x40x55 cm
Note: Rules may differ when interlining with another airline.