Hey Steve,
the Masso G3 Touch itself is 26 × 16 × 9 cm.
The Elite power supply looks like they used the same case as on the Standard Series Onefinity Controller, which is W = 19.5 cm D = 25.3 cm and H = 9.5 cm.
For table dimensioning of Journeyman (both Standard and Elite Series) see here and here.
Welcome to the forum!