* Formal: It is customary to wear a suit and tie to this event.
* Informal: We had the customary holiday dinner with all the trimmings.
* Descriptive: The customary afternoon tea was served in the grand ballroom.
* Contrastive: While it's customary to tip waiters, it's not always expected in this country.
* Historical: In the Victorian era, it was customary for women to wear long dresses.
Let me know if you'd like me to create a sentence using "customary" for a specific situation!