Its gonna be the same as the 14 turn motor. Here is a link to the data sheet with dimensions for the ZS40 series motors. You would use the ZS4025 dimensions: http://media.hyperion.hk/dn/zs/ZS40-DIM.pdf
Looks like lenth, excluding x mount and shaft is 58.8mm and the diameter is 49.1mm. An length from the firewall (including x mount) to the back of the prop (where it rests against the prop adapter) is 80.1mm.
I do have one of these left.