those 3 gauges in the center of the dash - what size are they? the z is in storage hundreds of miles away so i cant exactly walk out and measure

i'm looking to liven up the scenery with some fancy functional gauges and would like to know what size the gauges are? also, would be interested in seeing what others have done as well.

cheers fellas.

 

i'm pretty sure its 2 5/8 in size. i've seen autometer gauges used.