Isaiah the Prophet's Seal Impression/Bulla 3D Recreation resin cast. The enlarged seal is 2 inches, and the actual size is 3/4 of an inch. The seal impression is called a bulla. The bulla says, “Belonging to Isaiah the prophet”. It was unearthed at the Ophel excavation site in Jerusalem. Eliat Mazar is the head of this excavation. This is an amazing discovery.