My MDT is 9' tall at the roof, but it's 4x4 too. Most 2wd heavy MDT on 22.5" wheels are about a foot shorter.
It's the same width as a dually pickup, 96".
MDT come in a multitude of frame lengths, so one can be as short as about 16' and as long as you want it. Mine is a crew cab with 12.5' bed and extra long front frame/bumper, so is about 25' long overall. Without the crew cab and extra long bumper, it would be about 20' long, which is about as long as my F350 crew cab 8' bed pickup. MDT can have beds as short as 9'.
2001 International 4800
33,000 GVWR
12,000 FGAWR
21,000 RGAWR
16,000 UVW
17,000 Payload