Tile sizes: standard formats and how to choose for each room

Tile sizes range from tiny mosaics of a couple of centimetres to porcelain slabs taller than a person. Most tiles sold in Singapore are made to metric formats such as 300 by 300, 300 by 600, 600 by 600 and 600 by 1200 millimetres, with larger slabs and small decorative shapes either side. The size you choose affects how big a room feels, how many grout lines you see, how the floor drains and how much the job costs to lay.

This guide sets out the standard formats, explains the difference between nominal and actual size, and suggests which sizes suit which rooms, from compact condo bathrooms to open-plan living floors.

Standard tile sizes at a glance

Standard tile sizes vary slightly between manufacturers and countries, but the formats below are the ones you will meet most often.

Category	Typical sizes (mm)	Common uses
Mosaic	20 x 20, 25 x 25, 50 x 50, small hexagons and pennies	Shower floors, feature walls, curved surfaces
Small wall and brick formats	75 x 150, 75 x 300, 100 x 100, 150 x 150	Splashbacks, bathroom walls, decorative panels
Medium squares	200 x 200, 300 x 300	Bathroom floors, balconies, patterned floors
Rectangles	300 x 600, 200 x 1200 (plank)	Bathroom walls, kitchen floors, wood-look floors
Large squares	600 x 600, 800 x 800, 1200 x 1200	Living rooms, kitchens, commercial floors
Large rectangles	600 x 1200, 750 x 1500, 800 x 1600	Open-plan floors, bathroom walls
Slabs	1200 x 2400 and larger	Walls, islands, feature surfaces, seamless floors

Some ranges, particularly those made for markets that use inches, come in slightly different formats, so always confirm the exact size on the box or specification sheet.

Nominal size versus actual size

The size printed on a showroom label is often a nominal size. The actual tile may be a few millimetres smaller, with the difference intended to be taken up by the grout joint. A tile sold as 600 by 600 might measure slightly under that.

Two other terms matter:

• Rectified tiles have their edges ground square and true after firing. They are very consistent in size, which allows narrow grout joints and a crisp, modern look.
• Calibrated or non-rectified tiles keep their pressed edges. Sizes vary a little more within a batch, so joints need to be wider to absorb the differences.

Mixing tiles from different batches, or rectified and non-rectified tiles in the same run, can produce uneven joints. Order enough from one batch, with spare for future repairs.

Floor tile sizes: choosing by room

Floor tile sizes should follow the size of the room, the shape of the floor and how it needs to drain.

Living and dining rooms

Larger formats, from 600 by 600 millimetres upwards, give fewer joints and a calmer surface across an open-plan space. Long rectangles can emphasise the length of a room. Very large formats need a very flat floor, which we explain in our guide to large format tile.

Kitchens

600 by 600 and 300 by 600 millimetres are practical choices: large enough to look calm, small enough to handle cuts around islands and cabinet plinths. Fewer grout lines also mean less cleaning where food is spilled.

Bathrooms

Shower floors need falls towards a drain. Small tiles, such as mosaics or 100 by 100 millimetres, bend easily to these slopes and give more grip through the extra grout lines. Larger tiles can be used if the floor slopes in one direction towards a linear drain. Outside the shower, 300 by 300 or 300 by 600 millimetres are common in compact bathrooms. Our condo interior design work often starts with this kind of decision, where every centimetre of a small bathroom counts.

Balconies and outdoor areas

Medium formats cope well with drainage falls. Choose a textured or matt finish, as outdoor floors in Singapore are often wet from rain.

Corridors and narrow rooms

Rectangular tiles laid along the length of a corridor make it feel longer. Laid across, they make it feel wider.

Ceramic tile sizes for walls

Ceramic tile sizes for walls tend to be smaller and lighter than floor formats, because wall tiles do not carry foot traffic and need to be fixed vertically. Glazed ceramic is lighter than porcelain and easier to cut, which makes it popular for splashbacks and decorative walls.

• Brick and subway formats such as 75 by 150 and 75 by 300 millimetres give a classic, textured wall. Our guide to subway tiles covers patterns and grout.
• Square formats such as 100 by 100 and 150 by 150 millimetres suit handmade-look glazes and grid layouts.
• 300 by 600 millimetres is a common bathroom wall format, laid vertically or horizontally.
• Large porcelain panels reduce joints on bathroom walls, at the cost of more difficult handling.

How tile size changes the look of a room

There is a common belief that small rooms need small tiles. Often the opposite is true: a larger tile with fewer joints can make a small floor look more open. What matters most is how the tiles meet the walls.

• Plan the setting-out. Centre the layout so cut tiles at opposite walls are equal, and avoid thin slivers at doorways or along the most visible wall.
• Consider scale. In a tiny bathroom, a very large format may leave only one or two whole tiles, which can look awkward. A medium format may sit better.
• Match grout to tile. Matching grout softens a grid. Contrasting grout emphasises it, which suits patterned and heritage-style floors.
• Align joints across surfaces. Where wall and floor tiles share a module, lining up joints gives a precise, considered finish.

Practical points before ordering

• Thickness. Large tiles and slabs vary in thickness. Check that floor levels, door clearances and thresholds still work.
• Floor flatness. The bigger the tile, the flatter the floor must be.
• Access. Large boxes and slabs must fit lifts and stairs. Condo deliveries may also need MCST approval.
• Waste. Allow extra for cuts, breakage and future repairs, more for large formats and diagonal or herringbone layouts.
• Slip resistance. Size does not set grip, but finish does. For wet areas, check the slip rating of the actual tile.

For a wider comparison of materials, from ceramic to porcelain and stone, read our guide to tile types. Natural stone and other surfaces we specify are gathered under other finishes.

Related reading: Herringbone tiles.

Frequently asked questions

What is the most common floor tile size in Singapore homes?

There is no single standard, but 600 by 600 millimetres is a widely used format for living areas and kitchens, with 300 by 300 and 300 by 600 millimetres common in bathrooms. Larger formats such as 600 by 1200 millimetres are increasingly popular in open-plan homes.

Do larger tiles make a room look bigger?

Often, because fewer joints break up the surface. In very small rooms, though, large tiles can mean most pieces are cut, so a medium size may look better. Plan the layout before deciding.

Why is my 600 by 600 tile not exactly 600 millimetres?

Many tiles are sold by nominal size, with the actual tile slightly smaller to allow for the grout joint. Rectified tiles are more consistent, but always check the actual dimensions on the specification.

What tile size is best for a shower floor?

Small tiles, such as mosaics or 100 by 100 millimetres, follow drainage falls easily and offer more grip. Larger tiles can work with a linear drain and a single slope, planned during construction.

If you are planning floors and bathrooms and would like help choosing tile size, material and layout, please arrange a consultation. We specify the finishes and coordinate the work through experienced partner tilers.