If you're looking for a meeting place or a good stop around ½ or halfway between Saint Kilda East and Murrumbeena, you can try Glen Iris, Australia, which is about 7 minutes east of Saint Kilda East, or about 7 minutes north of Murrumbeena.
If you drive straight through without stopping at all, the total distance is 8 km. The distances shown above don't include local roads to get into each town, so if you're planning a long road trip, make sure you factor in traffic and road conditions, rest stop breaks, and interesting detours along the way. If you're in a rush, you can do the trip with zero stops, and your total travel time would be around 14 minutes.