Bathroom sinks are available in several applications, i.e. above counter, drop-in, under-mount, vessel, pedestal, wall-mount, formed into the counter top, or recessed & semi-recessed into the counter top. Often the space available will narrow these choices.
Next, the desired design theme may be considered, such as Modern, Contemporary, or Traditional to further narrow down the many options.
The cabinet size of the vanity may also play a role in deciding whether a particular sink will fit.
Also the style and type of faucet desired should be considered while choosing a sink, as not all sinks offer the flexibility to be installed with every faucet type such as one-hole, 4" or 8" spread faucets.
While some sinks are available in white only, others are offered in a palette of colors to choose from.
If a toilet is being purchased as well, we recommend purchasing both the sink and the toilet from the same brand name because not all "white" colors are alike between two differing brands.