ihr Zimmer ist

her room is / your room is

→ ihr
phrase Rare #47,586
her room is / your room is “ihr” means “her” when lowercase. Capitalized “Ihr” means the formal “your.” The meaning depends on capitalization and context.
GE: Ihr Zimmer ist am Ende des Flurs.
EN: Your room is at the end of the hallway.

Ihr Zimmer ist am Ende des Flurs.

Her room is at the end of the hall.

Ms Gardner, ihr Zimmer ist fertig.

Ms Gardner, your room is ready.

— The Big Sick (2017)