I don't get all these luggage questions lately when everything regarding luggage and size/weight allowances is clearly explained right on the airline's website. As you'll see:
1.) The personal item can be anything up to 40 x 30 x 15cm (16 x 12 x 6in).
2.) Carry-on luggage can be anything up to 56 x 45 x 25cm (22 x 18 x 10in) including wheels and handles.
3.) The maximum weight for carry-on luggage is 23kg/51lb.