The actual dimension of the tyre depends on which rim you use with them. There’s a much wider range of rim options with fat tyres than with normal tyres – people are using from 40mm to 100mm rims.
On this bike I am using a narrow rim (40mm) which gives me a tyre width of about 83mm. I haven’t measured the height, but it has the same clearance from the fork crown as a 29er tyre (Racing Ralph), so it is of a similar height.
On a 80mm rim the tyre width would be close to 100mm, and on a 100mm rim I would expect to see it go to around 105mm. This is based on what happens with other fat tyres I have. I haven’t tried the Floyds on wider rims because I won’t be using them on wide rims.