Just got a Citywing Reminder for my flight later in the week look at the last two lines note change of airline
Unchecked baggage. You may take one item of hand baggage onto the aircraft free of charge, as long as it fits into the luggage gauge sizer at check-in and weighs less than 6kg. The dimensions of the sizer are: Length: 50cm, Width: 35cm and Height: 22cm including handles and wheels. Any item of baggage larger or heavier than this must be checked in. When you board the aircraft, crew or ground staff will place your hand luggage in the hold unless it is small enough to fit under the seat. You can then collect your hand luggage as soon as you disembark from the aircraft.
P8 Flights operated by Sprint Air.
Cardiff - Anglesey Flights are operated by North Flying.
This is the bottom of the old ticket
Unchecked baggage. You may take one item of hand baggage onto the aircraft free of charge, as long as it fits into the luggage gauge sizer at check-in and weighs less than 6kg. The dimensions of the sizer are: Length: 50cm, Width: 35cm and Height: 22cm including handles and wheels. Any item of baggage larger or heavier than this must be checked in. When you board the aircraft, crew or ground staff will place your hand luggage in the hold unless it is small enough to fit under the seat. You can then collect your hand luggage as soon as you disembark from the aircraft.
Operator Van Air Europe