How tall is Steven Silver Robert Guerrero | March 06, 2026 Steven Silver's Height5ft 10 ¼ (178.4 cm)American actor, best known for playing Marcus on TV series 13 Reasons Why.Photo by kathclick/BigStock.com13 Reasons WhySteven HeightsAverage Guess (17 Votes)5ft 10.31in (178.6cm)