Baggage allowance - Qatar Airways

What the official page says

Economy: Carry-on baggage 1 piece up to 7 kg. Business: 2 pieces up to 15 kg total. For flights to or from Brazil, Economy class customers can carry one piece of baggage up to 10 kg. The dimensions for carry-on baggage must not exceed 50 cm (length) x 37 cm (width) x 25 cm (depth). In addition to the carry-on baggage allowance, personal items may be carried: one small purse or small briefcase, a blanket or outerwear, a pair of crutches or walking stick, a camera or binoculars case, an infant's carrying basket, and same-day duty-free items.