The exterior wall is constructed in limestone. The part facing the sea consists of three stories, while the other part has only two stories since the amphitheatre was built on a slope. The maximum height of the exterior wall is 29.40 m. The first two floors have each 72 arches, while the top floor consists of 64 rectangular openings.
The axes of the elliptical amphitheater are 132.45 and 105.10 meters long, and the walls stand 32.45 m high. It could accommodate 23,000 spectators in the cavea, which had forty steps divided into two meniani. The seats rest directly on the sloping ground; The field for the games, the proper arena, measured 67.95 × 41.65 meters. The field was separated from the public by iron gates.