You don’t have to buy decorative shelf brackets - you can make them instead. With a little imagination and some common sense, you could take many household or flea market objects and turn them into creative and unique shelf brackets. Bicycle handlebars, old baseball bats, hockey sticks and children’s toys could all be usable as brackets. Just remember that first and foremost they need to provide stable and uniform support for the shelves that they are meant to hold up.
In a small bathroom, less is always more. If you include a vanity, you will probably need to choose a very small unit. Depending on your needs, you can choose the style (cabinet or drawers or a combination) that is most suited to your needs. Recessed medicine cabinets (set into the wall, with an unframed mirror) are ideal in small bathrooms.