The next thing on your list should be considering the number of sinks you want. Again, with a 48-inch space, you can easily fit two smaller sinks for a “his and hers” style look. You will have to decide if you need the additional sink, or if you even have the plumbing or the means to put it in. Often, people choose to stick with what they have if they aren’t doing a major bathroom overhaul. Running new plumbing lines or getting rid of old ones can be a lot more work than people anticipate.