Enclosed snowmobile trailers are manufactured in heights of 5 1/2 or 6 1/2 feet. This measurement specifies the exterior dimensions of the box. The total height of the trailer varies based on the size of the tires and frame. Most enclosed, three-place snowmobile trailers stand over 8 feet tall.
The exterior width of the box on a three-place, enclosed snowmobile trailer ranges from 7 to 8 1/2 feet. For all dimensions, the interior size of the box is 2 to 3 inches less than the outside.
For three-place trailers with a width of 7 or 7 1/2 feet, the box is usually 18 feet long. For trailers with an 8 1/2-foot width, the box length is 14 feet. Enclosed snowmobile trailers also have a v-nose hitch, which can add as much as 6 feet to the overall length. Although the v-nose is not included when stating the length of the box, many models enclose it along with the box to create extra storage capacity.