The guest bath has a shower and single sink vanity. (premierkauai.com)
Some bathing tubs are designed for single sinks, while others fit across double sinks and even across an adult bathtub. (amazon.co.uk)
I have a large single sink in my Wee Abode, and I was just telling my interior - designer cousin that I hope I never have to go back to a double sink. (maisondepax.com)