We have a Thor Axis 24.1 and had a hard time trying to decide between a Class C cover or a Class A. We felt we only had one chance to get the right cover, once you open the box, they never fit back in the box.
We went with the Class C cover from Empire covers and it fit to a T. See pictures
ProTECHtor Class C RV Cover Gray. Size code (EMP77C2)