Here's a brief summary of avianca bag policy:
Carry-on baggage:Economy passengers are generally allowed one carry-on bag with a maximum weight of 10 kg (22 lbs) and dimensions of 55 cm x 35 cm x 25 cm (21.6 in x 13.7 in x 9.8 in).
Business class passengers may be allowed additional carry-on items.
Checked baggage: The number of checked bags allowed depends on the fare type, route, and frequent flyer status.
https://www.airfleetrating.com/