Half-baths, as in 2.5 baths, should really be classified as closets. The size makes them a really tight squeeze, often requiring a "wide stance" so your knees don't rub the sink when you sit on the toilet!
Thus the popularity of the pedestal sink, which has a very narrow base to leave room for your knees. It's also a rather elegant design and proves sufficient when one doesn't need to use the sink base as storage for toilet paper or cosmetic products.
Half-bathrooms also don't sport a lot of wall space for towel holders either, so a few pedestal sinks, like the American Standard Ravenna pedestal sink, now come with their own towel racks as part of the sink!
But here is an unattached circular towel rack designed just for the pedestal sink, so if you already have the sink, or choose a pedestal sink without the bar, you can install the towel rack separately and affordably, at about $30.
Holding six or more towels, so each of your guests don't have to use the same one, the Pedestal Sink Towel Bar is space-saving hardware, that adds intention to your bathroom design.