Measurements : 11 cm/4.3inches
Torah - The first five books of the Hebrew bible (Genesis, Exodus, Leviticus, Numbers, Deuteronomy) portions of which are read every Shabbat. Traditionally, a reading of the entire Torah is complete in one year.
On top of mezuzah written hebrew letter "SHIN". This is first letter of "SHOMER DLATOT ISRAEL" or "Guardian of the Doors of Israel" - one of the names of G-d.