Here's that 'still in the block' inletted blank that came with my latest M/S project.
Sorry for the bad pics,,my specialty it seems.
The width at the magazine on the still to be shaped blank is 2".
The OAL of the blank is 38 3/4"". The wood overruns the edge of the muzzle by an 1/8".
This one was hand inletted so they could use a piece of wood no longer than absolutely necessary.
Having a blank turned usually demands a bit more length than the finished product but glued on extensions that are not be part of that finished stock can be used.
Some operators don't like to use them though.