I measured two exterior doors and the door frame is 4-1/8 inch. This is measured from the frame edge that is flush with the drywall to the joint between the frame edge and the stucco mould. That's a weird size, huh? I can buy a 4-9/16 jamb pre-hung Therma-Tru fiberglass door. The exterior wall is stucco and if I measure from the interior drywall edge outwards, with the 4-9/16 jamb there is not enough gap left to patch the stucco per se as it's 7/16 wider than the existing jamb, but I was planning to use a brick mould anyway. Does this all sound OK? Thanks.