How to Choose the Right Basin Size for Your Bathroom

The wrong basin size makes a bathroom feel cramped or leaves awkward gaps. Here's a step-by-step approach to measuring your space and choosing dimensions that feel right.

Step 1: Measure the Available Wall Space

Measure the wall where the vanity will sit, from obstacle to obstacle (walls, door frames, shower screens, towel rails). This is your maximum width.

Now subtract 20–30 mm from each side. This gives you a clean visual margin — the vanity won't look crammed against adjacent surfaces. The result is your target width.

With a bespoke unit, you can work to any width between 700 and 2400 mm. No gaps, no filler panels.

Step 2: Decide on Depth

Depth is measured from the wall to the front edge of the vanity. Standard depths range from 400 to 650 mm.

• 400–450 mm: Compact. Good for en-suites, cloakrooms, or narrow bathrooms where you need to preserve floor space. You'll still get a usable bowl, but the flat surround will be minimal.
• 500–550 mm: The sweet spot for most bathrooms. Enough depth for a generous bowl with a comfortable flat surround on all sides.
• 600–650 mm: Generous. Best for larger bathrooms where the vanity is a focal point. Gives you space for wider bowls and more countertop area.

Make sure the vanity doesn't project so far that it blocks the door swing, toilet access, or the path through the room. Leave at least 600 mm of clear floor space in front of the vanity for comfortable use.

Step 3: Choose Your Bowl Size

The bowl needs to be proportionate to the vanity. Too small and it looks lost; too large and you lose usable counter space. Here's a guide based on vanity width:

• 700–900 mm vanity: A 46×34 cm bowl works well. It's compact but functional, leaving enough flat surround for soap and a toothbrush holder.
• 900–1200 mm vanity: A 55×28 cm or 55×32 cm bowl balances well. The extra width around the bowl gives you usable counter space.
• 1200–1600 mm vanity: A 57×36 cm bowl gives generous proportions. Or position a 55 cm bowl off-centre (left or right) to create a larger prep area on one side.
• 1600–2400 mm vanity: Consider two bowls for a double vanity. Two 55×28 cm bowls keep proportions balanced. A single 68×36 cm bowl also works if one basin is enough.

Step 4: Think About Bowl Position

Centre-mounted bowls look balanced and suit symmetrical bathrooms. But off-centre bowls (left or right) can be more practical:

• Place the bowl on the tap side if plumbing is off-centre — it simplifies installation.
• Place it away from the wall in a corner installation to maximise the usable counter area.
• Match it to your dominant hand — a right-handed person often prefers the bowl on the left, keeping the right side free for products.

Step 5: Use the Configurator

The fastest way to see how different sizes look in proportion is to use our online configurator. Set your width, depth, bowl size, and position — the live preview updates in real time so you can see exactly what you're getting before requesting a quote.

If none of our five standard bowl sizes suit your space, describe your ideal dimensions in the quote form. We can design a bespoke bowl size to fit.

Quick Reference

For a typical main bathroom (1000–1200 mm vanity, 500 mm depth):

• Bowl: 55×32 cm, centred
• Material: sintered stone — non-porous, no sealing needed
• Edge profile: chamfered or rounded for a softer look

For a compact en-suite (700–800 mm vanity, 400–450 mm depth):

• Bowl: 46×34 cm, centred
• Depth: keep it to 420–450 mm to preserve floor space
• Skip the mirror cabinet if wall space is tight