Ski carriers are available that take up to 6 pairs of skis. You can use the filters on this page to view different sized ski carriers.
Estimates for the maximum number of skis a rack will carry are usually for traditional skis, not wider skis (e.g. carving, powder, all-mountain skis...). As some skis are wider than standard skis, you might not be able to carry the maximum number in this carrier, often one pair less. Check the loading width of the ski carrier (see the specifications tabs) against your skis to be sure. The Yakima FatCat Evo is an exception to this. It has an extra-long loading width, so unless you have exceptionally wide skis (bigger than 136mm at the tip) then it will take the suggested number of skis.