The seats in Section 217 are be 19 inches wide, which is the standard among modern ballparks.
Wider seating at Comerica Park can be found in the Tigers Den and On-Deck Circle club areas, which feature 22 inch wide seats. Tigers Den Club seating consists of sections TD120 to TD135, and On-Deck Circle Club seating is found in Sections 120-135 (directly behind home plate and between the dugouts).
Bleacher sections 101-106 are also an option for getting a little more room as these seats are on one long flat bench, rather than individual seats with chairbacks. But if the bleachers are crowded, it may be difficult to find the extra room.