I had an older 2.5-8x36 that I sent back to Leupold to be cleaned and serviced, it wasn't broken.
They sent me a new VX-3i 2.5-8x36. It looks just like my VX-3 2.5-8x36, uses the same Butler Creed caps, so I'm thinking dementions are going to be the same.
You can find Butler Creek size charts on line.
My Brownells catalog has one and that's what I use.
You can measure scopes, also get that info on line
DF