Faucet Placement: Undermount sinks can have different faucet placement options, such as center-set or offset. The placement you choose will depend on your personal preference and the style of your bathroom.

Budget: Undermount sinks come at different price points, so it's important to have a budget in mind before making a decision. Keep in mind that a higher price tag doesn't necessarily mean a better sink, so make sure to do your research.
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In conclusion, choosing the right undermount bathroom sink for your small bathroom involves considering factors such as size, shape, material, faucet placement, and budget. With careful consideration, you can find the perfect undermount sink to maximize space and elevate the style of your bathroom.