South Yarra and Prahran border and morph into each other at Commercial/Malvern Road. South Yarra is a mile north of Prahran. Its northern border is the Yarra River, and it extends west to Punt Road, east to Williams Road, and south to Malvern Road. Malvern Road becomes Commercial Road at the junction with Chapel Street. Prahran's northern border is Commercial/Malvern Road; its western boundary is Punt Road. The eastern boundary is Williams Road and it extends south to High Street.