Tile size is the sort of decision that sounds straightforward until you're standing in a showroom holding two samples that both look completely right. Then you get home, hold them up against the wall, and suddenly neither does.
The truth is, tile size does more heavy lifting than most people realise. It shapes the atmosphere of a room, affects how practical the space feels to live in, and can make a modest bathroom feel spa-like or a generous kitchen feel cluttered. So where do you start if you want to get this right?
We've pulled together the advice that actually helps: what to consider first, where tile size really matters, how different tiling patterns interact with scale, and how to mix formats without it looking accidental.
Article continues belowWhat should you consider first when choosing tile size?
Start with function, not aesthetics. Damla Turgut, founder at Otto Tiles, is clear on this: "The first thing I always ask is where the tile will be used and what role it needs to play in the space. Tile size should be guided by function as much as aesthetics."
A large open floor needs something durable and continuous. A splashback, alcove or feature wall can afford to be more decorative. That's where smaller or medium formats come into their own, introducing pattern and texture without overwhelming the space.
Once you've nailed the function, consider how your choice of tile makes a room feel. As Grazzie Wilson, head of creative at Ca' Pietra, explains: "Tile size quietly shapes the entire atmosphere in a way people do not always expect." She says that larger formats tend to create calm, with fewer grout lines, less visual interruption and a surface that lets the eye rest. Smaller tiles introduce texture and intricacy that rewards a closer look. .
So before you fall for a tile in the showroom, ask two questions: what does this surface need to do? And how do I want this room to feel?
Damla Turgut is the founder and creative director of Otto Tiles, a London-based studio known for its thoughtful approach to colour, pattern and handcrafted materials.
Grazzie Wilson has spent more than a decade working in the interiors industry. As Head of Creative at Ca' Pietra, one of the UK's leading stone and tile brands, she oversees product collections and the company's distinctive visual identity.
Does room size affect which tile size you should choose?
The short answer is yes, but it's not quite as simple as big room equals big tile. As Damla Turgut puts it: "Larger spaces often benefit from bigger tiles, while smaller areas can handle more intricate formats." The logic is sound, but it's a starting point, not a rule.
Take a compact bathroom. Instinct might say go small, but a large-format tile with fewer grout lines can actually make a modest space feel bigger, not more cramped. The key is proportion. If the tile suits the scale of the room, it can be transformative. If it overwhelms it, you'll know.
Lesley Taylor, founder at Baked Tiles, brings it back to practicality: "Tile size affects how practical the space feels once it is lived in." A smaller room with lots of small tiles means a lot of grout to clean. Worth thinking about before you commit to anything too intricate.
The bottom line? Room size sets the parameters but it doesn't make the decision for you.
Lesley Taylor is an interior designer with more than 25 years' experience across residential and commercial projects. A registered member of the British Institute of Interior Design (BIID), she has authored ten books on interior design.
Shop small format tiles
With their delicate shimmer and straightforward installation, these mother of pearl mosaic tiles are dsigned to be noticed.
These linear finger-like kit kat marble mosaics are a great design solution for a kitchen splashback or in a bathroom or shower space.
Crafted from natural stone, these mosaic tiles feature varying shades of greens, enhanced with delicate grey veining.
Which tile size suits which room?
Every room has its own demands. Here's how to think about tile size room by room:
Kitchens
Kitchens tend to reward larger formats on the floor. A continuous surface is visually calmer and better suited to the scale of most modern kitchens. Mid-sized tiles work well on splashbacks, where you want a bit more visual interest without the surface becoming too busy.
As Damla Turgut notes, "in areas such as splashbacks, alcoves or feature walls, the tile can be more decorative. That's where medium or smaller formats can work beautifully, as they allow you to introduce pattern, texture or rhythm without overwhelming the space."
Bathrooms
The bathroom is where smaller tiles have historically earned their reputation, and for good reason. Mosaic and metro formats add grip, handle curves and awkward corners more gracefully, and bring a sense of detail that suits an intimate space. That said, large-format tiles in a bathroom are increasingly popular, and in a well-proportioned room they can look genuinely considered.
Hallways
Hallways are hard-working spaces and the tile needs to earn its keep. Mid-sized formats tend to perform best here, navigating doorways and changes in direction without excessive cutting. Larger tiles can work in a long, straight hallway but tend to struggle the moment the layout gets complicated.
Bedrooms and living rooms
Living room tiles and bedroom tiles get to play by different rules. Without the grip requirements, steam and heavy footfall of kitchens and bathrooms, you can be a bit more creative.
In these spaces, larger formats create a calm, unfussy base that lets the rest of the room do the talking without the floor competing for attention. Smaller or patterned tiles, meanwhile, come into their own as a feature element. Behind a headboard in a bedroom, they bring the kind of detail that wallpaper offers but with considerably more staying power. In a living room, a patterned tile used to define a seating area or fireplace surround can anchor the space in a way that feels intentional rather than decorative for decoration's sake.
Outdoor spaces
Scale matters outside too. Larger porcelain formats are popular for patios and garden rooms, creating a seamless indoor-outdoor feel that works especially well when the same tile runs through from inside. Smaller formats offer more flexibility on uneven ground but do mean more grout lines to maintain.
Can you mix large and small tiles in the same space?
Yes, but with intention. Mixing tile sizes is one of those things that looks effortless when it's done well and immediately obvious when it isn't. The difference is usually whether each tile has been given a clear role.
Lesley Taylor is practical on this point: "When you are mixing tile sizes, the most important thing is to give each one a clear role within the space so it feels designed rather than random. You might use larger tiles to ground the room and then introduce smaller formats as a feature or to highlight a specific area, but keeping the colours or finishes linked will help everything sit together."
That last point is worth underlining. Contrast in size can work beautifully. Contrast in size, colour and finish simultaneously is where things start to feel busy. Pick one thing to play with and keep the rest considered.
The other thing to get right is the grout. Matching grout colour across different tile sizes helps unify a mixed scheme. Contrasting grout on every surface pulls it apart.
Shop large format tiles
Statement-making and with true modernity, this South American slate adds an architectural emphasis to any interior. The huge format tiles give a clean, dramatic finish to walls and come in two colours: grey and black.
Sleek and considered, these extra-large format tiles bring the drama of natural marble to walls and floors. A three-dimensional veining effect and minimal grout lines do the rest.
FAQs
Do large-format tiles cost more to install?
Usually, yes, though the tile itself isn't the only reason. The real cost is in the preparation. Grazzie Wilson is clear-eyed about this: "With larger formats, there is also a practical layer to consider, as they do ask for a higher level of precision during installation; the substrate needs to be exceptionally flat, handling becomes more complex, and specialist levelling systems are often required to achieve that seamless finish, which can have an impact on labour. It is not a drawback, but it does mean the result relies heavily on skilled hands."
Damla Turgut adds that the consequences of getting it wrong are visible: "The adhesive coverage must be very precise to avoid issues such as hollow spots or uneven edges, and installers often need specialist tools such as suction lifters and larger cutting equipment to handle them safely."
Smaller tiles are generally more forgiving during installation, particularly in rooms where the walls or floors aren't perfectly straight. That flexibility can translate into lower labour costs – as you can often tile floors and walls yourself – though a very intricate small-tile layout brings its own time demands.
Does tile size affect resale value?
Less than you might think, and more than you'd hope. Tile size alone certainly won't make or break a house sale, but the overall impression a tiled room creates absolutely will.
Grazzie Wilson puts it well: "When it comes to resale, we find it is rarely about chasing a particular tile size and more about creating a space that feels balanced and thoughtfully put together, although there is a quiet confidence in well-proportioned tiles that suit the scale of the room, as they tend to appeal more universally than anything that feels overly busy or overly stark."
In other words, a bathroom tiled in a format that suits the room will always feel more appealing to a buyer than one where the scale feels slightly off, however hard it is to articulate why. Buyers may not be able to name what's wrong. They'll just know something is.
Ready to take the next step? Our guides to where to buy floor tiles and how many tiles do you need will help you move from decision to delivery, without the maths headache or the mystery of why you always seem to end up with too many or too few.
