There are no clear photographs of these equipment next to existing gear... unfortunately.
Could not find dimensions but if we look at the publicly available photos we can get a good estimate since they're all about the same size.
In comparison, standard 8T8R is ~5' tall and standard 10 port / triband / deca hex etc are around 6-7' tall while MMRs are significantly smaller compared to adult males. so I take it 3' or so?