On 1/9/2018 12:44 PM, Jessica Hefford wrote:
replying to Don Y, Jessica Hefford wrote:
The opening (without door box) is 35.5". What size door/door box should be
installed?


If you didn't bother to read through almost two years of discussion, try
this: "Typically the rough opening required when installing a prehung
door should be sized 2 inches wider and 2 inches higher than the prehung
door itself. For example a two-foot, eight inch (32€�) by six feet, eight
inch high (80€�) prehung door, would require a rough opening width of 34
inches and a height of 82 inches."

Your opening is too big for a 32" and too small for a 36". If it's
plumb, you can most likely slip in a 34" prehung door even though the RO
is a shade skimpy.