What do you use as the "length of your travel trailer"?

It really does not matter if your TT is 25 or 27 feet. I have found the model numbers are just a suggestion anyway.

My box measures 24 ft 7 in at its widest point so I tell folks it is a 25 foot. I supposed the bumper and the hitch could be added.

Most campgrounds I have been at seem to judge the lengths as Smaller 25 ft or less, Midsize 30 ft or so, Large 45 ft or more.

Storage lots that pack the TTs close may need a more accurate figure.