VNT 15 and VNT 17/22 inlet size

Im looking to build myself an OMI for the VNT15 on my car. I was wondering what the inlet size is on that turbo? I searched and didnt find anything and do not feel like pulling it off just to measure. Also what size is the vnt 17/22 i plan on upgrading to that in a few months and want to build everything so I can just swap elbows.
Thanks
Justin

Can anyone help me out???

1.8" and 2.25"(maybe 2.5)

2.25" boost hose fit perfectly to join my 17/22 to the PD 150 intake pipe I am using.