As stated above, it should work as long as you can move the rollers inboard. However, it will be a lot bigger than you really need for the Wave. We picked up a 14 this winter (which is even bigger than the Wave) using our 18 trailer and it looked pretty silly with such a small boat on that big of a trailor. It worked fine though.
If you're just making one trip, I'd say do it. If you're looking to use the trailer a lot, I'd say either plan on modifying the 18 trailer (shorten & move the cross bars and possibly shorten the tongue), or look for a more suitably sized trailer.
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