Here ya go...
The yoke itself (the external part) is a 4.5"H x 4.5"W x 5.25"D box. The total width of the handles is 8.25" at top and 10.5" at bottom. There is about 3" clearance between the handles and the control panel.
The mounting plate is 4.5" x 4.5"
The depth of the spring-loaded shaft bracket is 5" (from the mounting plate.)
The width of the shaft bracket is a little over 2"
The end of the shaft (with the gears and x-axis pot) is an L-shape about 4" wide and extends to the right.
Be warned that the yoke is front-heavy (it's all metal!), so if your control panel is not heavy enough, you may need to weight or clamp it down.
Hope this helps.