The key factor is the height and style of your basin. For standard inset or semi-recessed basins, a regular deck-mounted basin mixer with a spout height of around 100–140mm works well. However, if you have an above-counter or vessel basin, where the bowl sits on top of the benchtop, you will need a tall basin mixer with a spout height of 180mm or more, otherwise the spout will sit below the basin rim and water will splash onto the benchtop. Wall-mounted mixers offer another option for above-counter basins, with the height controlled by your rough-in position. Always confirm basin rim height before purchasing your tapware.

An above counter basin (also called an above bench or vessel basin) sits on top of the vanity benchtop rather than being inset into it. The full exterior of the basin is visible, making it a strong design statement. Above counter basins are available in ceramic, stone, concrete, and composite materials in a range of shapes, round, oval, rectangular, and sculpted forms.

Above counter basins are typically paired with tall wall-mounted basin mixers (due to the elevated height of the basin rim) or with deck-mounted tall spout mixers positioned beside the basin on the benchtop. The spout height needs to be sufficient to clear the basin rim, this is a critical detail to check when ordering tapware. Look for tall spout mixers or wall-mounted styles specifically described as suitable for above counter basins.

Because above counter basins sit proud of the benchtop, there is a junction between the base of the basin and the benchtop surface that can accumulate water and soap residue. Silicone sealing around the base helps, but the perimeter does require wiping down regularly. Basins with a minimal contact footprint (like a round pedestal-style above counter basin) are easier to clean around than those with a large flat base.

Above counter basins typically range from 350mm to 500mm in diameter or width. For a single vanity with a benchtop of 600 – 900mm wide, a 400mm round basin is a popular choice. For a paired double vanity, two 350 – 380mm basins work well with adequate bench space between them for storage.