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How many days are in a regular Jewish calendar year?

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Circular diagram of the Jewish religious year showing Hebrew months around the outer ring and Gregorian months inside, with major holidays and fasts such as Rosh Hashanah, Yom Kippur, Sukkot, Hanukkah, Passover, and Purim labeled with their dates. — Jewish religious year The months and holidays of the Jewish religious year.

A regular (common) year in the Jewish calendar consists of 353, 354, or 355 days.12

The number of days varies based on the length of the months of Ḥeshvan and Kislev, which can each be either 29 or 30 days depending on the specific year. These variations are categorized as follows:12

Defective (ḥasera): Both Ḥeshvan and Kislev are 29 days, totaling 353 days.2
Normal (sedura): Ḥeshvan is 29 days and Kislev is 30 days, totaling 354 days.2
Complete (shelema): Both Ḥeshvan and Kislev are 30 days, totaling 355 days.2

Because the Jewish calendar is lunisolar, these common years are adjusted to the solar year through the periodic addition of a 13th month in leap years, which contain 383, 384, or 385 days.12