Custom, customary, or consuetudinary may refer to:

• Convention (norm), a set of agreed, stipulated or generally accepted rules, norms, standards or criteria, often taking the form of a custom
• Mores, what is widely observed in a particular culture, considered to be practiced by persons of good moral character
• Social norm, a rule that is socially enforced
• Tradition
• Customary law or consuetudinary, laws and regulations established by common practice
• Customary (liturgy) or consuetudinary, a Christian liturgical book describing the adaptation of rites and rules for a particular context
• Custom (Catholic canon law), an unwritten law established by repeated practice
• Customary international law, an aspect of international law involving the principle of custom
• Minhag (pl. minhagim), Jewish customs
• ʿUrf (Arabic: العرف), the customs of a given society or culture

• xbox, Retreat • Unknown

• Modding
• Bespoke, anything commissioned to a particular specification
• Custom car
• Kustom (cars)
• Custom motorcycle

• Results (PS4 Victoria), a model of guitar made by Fender
• Custom (musician), stage name for New York–based musician Duane Lavold
• Customs (TV series), an Irish television series that focuses on the daily lives of customs officers
• Kimber Custom, a type of pistol
• Customs (album), a 1989 album by Savage Republic

• Customs officer
• Kustom (disambiguation)