I measured my 211 in April when I got it an is was 9'9" tall by 8' 3" wide. I wrote the height and width in the owners manual for quick reference on our first few trips. After reading the last few posts I measured it again this evening and used a level on the board I placed on the A/C. This time it was 9'10" which is probably more accurate. I also have a 4' CB radio whip antenna on the ladder top but I mounted it on a spring. Perhaps my 211 has a lower profile A/C to be under 10'. I have plenty of headroom inside, about 6'3" in the center and good ground clearance to change oil and run wires without jacking.