Each airline limits the amount of baggage you can take (number of suitcases, weight and dimensions). Check your ticket or ask your travel agent or airline. If you exceed these limits, extra charges may be applied.
It might be worthwhile to ship extra-large or heavy parcels as air cargo. Always check with your airline.
Regardless of the number of bags and the total weight of your baggage, each piece may not weigh more than 32 kg. This limit applies since 2006 and holds for all baggage that is checked in at Brussels Airport and at several other international airports.