A round back upholstered side chair. Finding a premade slipcover will be a challenge - most have a square back. Options: reupholster, custom slipcover, or modify a premade square back slipcover to fit. Please note if you choose to reupholster you can leave the apron off and expose the legs for an updated look. Good luck.

The time will be well spent when you have two like new chairs reupholstered. Comfortable chairs can be hard to find. Congrats on the new house!