A 10" rough toilet will work in that situation.
Terry

: I have exactly 10 1/2" from unfinished stud wall and planning 1/2" drywall to finish. Will a 10" rough in toilet work, or will it be too tight? Appears that most plans have a 1" gap between wall and tank on 10" toilets so should be possible to gain up to 1/2" here if necessary? Are there any alternatives to consider?