How tall is Sean Maher Olivia Carter | February 01, 2026 Sean Maher's Height5ft 8 ¾ (174.6 cm)American actor, best known for his role as Dr. Simon Tam in Firefly and Serenity.5ft 8 Rob and Sean @ LFCC 2016FireflySean HeightsAverage Guess (47 Votes)5ft 9.03in (175.3cm)