8 is roughly 36" at it's widest, about 31.5 at the bottom corners & about 30 high.
6 & 7 should be close to the same dimensionally, 6 (ones I have worked with anyway) were a 3 piece assembly with the main center piece in stainless and the side two pieces in aluminum about 1.5" wide each. The 7 is a one piece panel.