What size can my suitcase be?

What size can my suitcase be?

Porterage for one suitcase on tour is included in the tour price. Due to limited coach capacity, we strongly recommend that this single bag should have dimensions not exceeding 76x53x28cm (30"x 21"x 11") and weight not exceeding 22 kg (50 lbs).  Please also note that airline carriers, cruise lines and other forms of transportation may have restrictions and requirements including weight.   Some airlines are also charging fees for additional checked baggage in excess of one per passenger and these fees are not included in the tour package.