The external measurements of the Cathedral are 93 meters long, 40 meters wide and 28 meters high at the central nave. The bell towers reach a height of 54 meters. The cimborio measures 70 meters on the outside and 41 meters on the inside.
On the interior, not including the chapels on each side, the Cathedral is 79 meters long and 25 meters wide. Each chapel is 9 meters high, 5 meters wide and 6 meters deep. The central nave is 13 meters wide and 26 meters high. The lateral naves are 6 meters wide and 21 meters high, while the pillars measure 15 meters from their bases to the beginning of the arches.