Amazon Basics Room Darkening Blackout Curtain Rod – 28″ to 48″, Black Price: $17.79 (as of 10/04/2023 12:03 PST- Details)

Adjustable-length curtain rod in Black extends from 28 to 48 inches end-to-end excluding finials, 33 to 53 inches including wraparound ends
5/8-inch rod diameter capable of handling moderately heavy fabrics; can hold up to 20 pounds
Curtain rod curves at both ends, wrapping curtains around the window from end-to-end, blocking out light while insulating the room