Check the websites of the airlines you fly most frequently to learn
about the size of travel bags you can check or carry on board, and
keep in mind that many airlines have different size requirements
for international and domestic flights. If your new travel bag
exceeds the limits of the airline's size restrictions, you'll have
to deal with the consequences (read: fees). The Goldilocks
principle sums up what you want in a travel bag: a travel bag that
is neither too big nor too small, but just right (for you).