450 x 450mm tiles: the mid-size square, in four ranges
A 450 x 450mm tile is a square 45 centimetres on each side. It sits between the small formats and the large ones, and it is one of the most common sizes for floors in an ordinary-sized room. This collection holds stone look and terrazzo look porcelain in that size, plus one ceramic wall tile, in four ranges: Southside, Avalon, Burleigh and Kings Marble.
The sections below explain where the size sits, what each range prints on its listing, how the edges and joints work, and how to set out a floor. For neighbouring sizes, see the 300mm x 300mm tiles collection and the 600mm x 1200mm tiles collection. For the shape on its own, see the square tiles collection.
Where the size sits
A Queensland retailer describes 450 x 450mm as a practical everyday size that fits into most rooms without much planning. It says the size sits between small format and large format tiles, which gives flexibility without losing coverage, and that the square shape keeps layouts straightforward, especially in rooms with tight corners or unusual angles. The retailer's FAQ adds that the balanced size works in smaller spaces and does not overwhelm them.
The first retailer adds that the size is easier to handle than very large formats and needs less surface preparation. That matches the practical difference between this collection and the large tiles collection. A 450mm square is easier to handle and needs less surface preparation than a very large tile, though a flat surface still helps.
Quantities and boxes
A 450 x 450mm tile covers 0.2025 square metres, so a square metre takes about five tiles before cuts. The listings print the box line directly: 7 pieces for 1.42m². Seven tiles at 0.2025 square metres each is 1.4175, which rounds to the printed coverage, so the box line and the arithmetic agree.
The same grid maths applies to any size. For the next format down, a 300 x 300mm tile covers 0.09 square metres, and the 300mm collection explains why more joints follow. Ask your tiler to confirm the quantity for your layout, because a diagonal layout and a room with many cuts both need more tiles than a straight lay across an empty floor.
The four ranges
Each range prints its own details on the listing. The core lines are Dimensions, Material, Wear Rating and Edge, with Finish, Slip Rating and Area on some pages. These show the spread.
Southside is a terrazzo look porcelain. The listing says it brings a classic Venetian terrazzo look into everyday homes, and that it is made in Australia. The matte version is a glazed porcelain at 7.5mm. Avalon is a stone look porcelain, described as having subtle vein movement through the tile, and it comes in white, greige, grey and charcoal.
Burleigh is a stone look porcelain with a cushioned edge, in white, silver, grey, latte and charcoal. Kings Marble is the one ceramic range, a Carrara marble look with grey veining and a matt finish. For more marble looks in other sizes, see the marble look tiles collection. For terrazzo looks, see the terrazzo look tiles collection.
The colours run from white and silver through greige and latte to grey and charcoal, with a natural terrazzo. For single colours across the store, see the grey tiles collection, the white tiles collection and the beige tiles collection.
Matte and external versions
Several ranges come in two versions. The matte tiles are listed with a P2 slip rating, and the external tiles carry P5 in the product title. AS 4586 classifies the slip resistance of new pedestrian surface materials, and its wet pendulum test uses ratings from P0 to P5. The rating applies to floors people walk on, not to feature walls.
The Southside matte listing prints the full line: P2, high slip risk, not recommended for wet areas. That is a clear instruction for a wet room. The external versions carry P5 in the title, so they are the ones to look at for a wet spot. The same matte listing prints Area as Indoors dry and covered outdoor areas, so read that line as well.
No single rating suits every bathroom or outdoor location. Confirm what the exact surface needs with your builder or tiler, and read the Slip Rating, Application and Area lines together before choosing a version. The floor tiles collection and the outdoor tiles collection explain these ratings in more detail.
Walls or floors
The porcelain tiles print a Wear Rating of 4, described on the listing as suitable for floors in normal use areas with a low risk of scratching. The Burleigh and Avalon listings go further, saying the tiles suit wall and floor surfaces exposed to heavy duty wear by regular traffic, and that they can be used in entrances, laundries, patios and more.
Kings Marble is different. The listing says it is intended for wall applications only and not suitable for flooring, and the Wear Rating line reads Wall Category 0. If the plan is a marble look floor in this size, choose another range. If the plan is a wall, Kings Marble is the one listed for it. The wall tiles collection sorts wall formats by size.
Rooms the size suits
A Queensland retailer says 450 x 450mm tiles suit small and medium bathrooms, where larger tiles might feel oversized, and that they give a neat grid pattern that pairs with contemporary and classic bathroom styles. It says the size works in kitchens because it handles daily traffic and is simple to keep clean, and that in medium-sized living rooms it creates a calm and balanced look.
The same retailer says the tiles fit neatly into narrow rooms without drawing attention to the width, and that laundries often use this size because it sits well around cabinets and appliances. It adds that small offices, clinics and retail spaces choose the format for its steady appearance and simple cleaning. For room-led collections, see the bathroom tiles collection and the kitchen tiles collection.
Edges and grout joints
Every tile in this collection is listed as non-rectified. A retailer explains the difference: rectified edges allow tighter grout joints and a cleaner finish, while non-rectified edges give a softer look and can suit more traditional interiors. So this collection is the softer, more traditional choice, and the joint is part of the look.
The listings print a joint recommendation. The Southside matte tile recommends a gap of over 3mm. The cushioned edge listings in Avalon, Burleigh and Kings Marble say the edges are naturally irregular and recommend grout lines of 3mm or more for a classic tiled appearance. The retailer adds that narrow joints create a modern look, while slightly wider joints soften the layout and work well with textured or rustic styles.
Cushioned edge tiles also vary in colour and texture. The listings say tiles installed will be similarly coloured with slight variation in texture and pattern. Mixing tiles from several boxes as you lay is the usual way to spread that variation, and a wider joint helps absorb the small differences at the edge.
Appearance and finish
The Appearance line reads V2 on the porcelain tiles, meaning slight variation in pattern. Kings Marble reads V3, moderate variation, so a box of marble look tiles shows more difference from tile to tile. Variation is the point of a stone look: a flat, uniform print is what looks artificial.
A retailer says matte finishes usually hide marks better in living areas, while gloss tiles are more reflective and are often used in decorative or low traffic areas. The matte porcelain suits floors that see daily use. Avalon also comes in a lappato finish, which the listing calls a matt lappato, and Kings Marble comes in matt and lappato. The Southside texture line reads low, flat on the matte version and slight variation in texture on the external version.
Setting out a floor
Most people use a simple grid layout with this size, a retailer says, though a diagonal pattern can add movement if the room needs more interest. The live tags on this collection show both ideas: the tiles are listed with a vertical stack pattern and a diamond pattern. Stack bond lines the joints up in a grid. A diamond layout turns the same tile 45 degrees, and the diamond tiles collection explains it in detail.
A US how-to guide advises starting from reference lines instead of walls, because walls are rarely straight or square to each other. It uses the 3-4-5 rule to check the lines are square: measure 3 units along one line and 4 along the other, and the distance between the marks should be 5. If it is not, adjust and mark again.
The same guide says to dry-set two rows of tiles from the centre to adjacent walls before fixing anything. If the last tile in a row would be less than half a tile, shift the first course. With a 450mm tile, that check is simple, and it avoids thin cuts along a visible wall.
Subfloor, cracks and heating
A retailer says that although 450 x 450mm tiles are more forgiving than very large formats, a flat surface still helps achieve a smooth result. On cracking, it says the cause is usually movement in the subfloor, and that proper preparation supports long term performance. The tile is rarely at fault.
On underfloor heating, the same retailer says many porcelain tiles are suitable, though the heating system and adhesive must match the installation requirements. Most of the porcelain listings here carry a note recommending the tiles be paired with underfloor heating for a warmer, drier, mould resistant bathroom. Check the heating manufacturer's instructions and the adhesive data sheet with your installer before committing.
Kings Marble and the lappato finishes
Kings Marble is the Carrara marble look in this collection. The listing calls it a series of Carrara marble with grey veining, in two finishes, matt and lappato. Both are ceramic, non-rectified tiles with a cushioned edge, a V3 appearance and a Wear Rating of Wall Category 0, and the listing says they are intended for wall applications only and not suitable for flooring. For the marble look at other sizes and in floor-rated porcelain, see the marble look tiles collection.
Avalon has a lappato version too. The listing describes the white as a contemporary white stone look porcelain with a matt lappato finish, and the Wear Rating line reads 4, the same as the matte tiles. So the Avalon lappato is a floor tile as well as a wall tile, and the finish is the difference you see in the room.
A lappato and a matte tile of the same colour can sit side by side. Because they share a colour and a size, a lappato wall above a matte floor keeps the room in one tone. Order samples of both and view them together, because the finish changes how the light falls across the surface.
Reading the Wear Rating line
The Wear Rating line on the porcelain tiles reads 4, Suitable for floors in normal use areas, low risk of scratching. That is the figure to read for a floor. The Burleigh and Avalon listings add that the tiles suit surfaces exposed to heavy duty wear by regular traffic with normal footwear, and the Kings Marble line reads Wall Category 0, which means walls only.
Read the Wear Rating with the Application line. The matte Southside tile prints Walls and Floors, so the two lines agree. A tile that prints Wall Category 0 on the wear line is the one to keep off the floor, and a tile with a floor wear rating still needs the right slip rating for the room. Three lines decide where a tile can go: Wear Rating, Slip Rating and Area.
Ordering extra and mixing boxes
The listings recommend ordering an extra 15 percent of tiles over the exact quantity required, to cover breaks and offcuts. They add that colour, size and texture may vary from batch to batch, so ordering enough at once reduces the chance of a mismatch if more is needed later. Keeping a few spare tiles for future repairs is also suggested.
Because the cushioned edge ranges vary in colour and texture, the same advice applies with more force. Open several boxes and mix the tiles as you lay, so the variation spreads across the floor instead of sitting in one corner. A wider joint also helps the tiles read as a whole.
Installation must be carried out by a licensed tiler to the appropriate Australian standards, according to the listings. Share the listing details with your tiler, including the joint recommendation, so the joint width and layout are agreed before the first tile is fixed.
Style tags and how the ranges read
The collection tags the ranges by interior style. Southside is tagged Mid Century Modern. Some of the Burleigh and Avalon tiles are tagged Japandi, Boho and Maximalist. Tags are a guide to the mood a tile belongs to, and the listing lines tell you how it performs.
The colours do most of the styling work. White and silver keep a room light, greige and latte sit in the warm neutral range, and grey and charcoal give a darker, more settled floor. A sample under your own lighting shows how a stone look reads beside your fittings. For a wider look at colour, the grey tiles collection and the beige tiles collection show how each shade appears in other formats.
Porcelain or ceramic
A retailer says porcelain tiles suit floors and high use rooms because of their strength, and that ceramic in this size is more common for walls or lower traffic areas. The collection follows that split. The porcelain ranges carry a floor wear rating, and the ceramic Kings Marble is wall only.
For other tiles by material, see the porcelain tiles collection and the ceramic tiles collection.
Where this size fits among the others
A 300 x 300mm tile is the compact square, with many joints and a busy grid. A 600mm tile has fewer joints and a calmer surface, and the large formats in the 600mm x 1200mm tiles collection have fewer still. The 450mm square sits between them and keeps the grid readable without making the tile heavy to handle.
Because the size is a square, it also suits a mix of layouts. It works as a straight grid, a diagonal, or a stack bond, and the choice changes the look more than the tile does. For a smaller, finer surface, see the small tiles collection.
Choosing between the ranges
Start with where the tile goes. For a dry floor or a wall indoors, the matte versions suit. For a covered outdoor area or a wet spot, look at the external versions and read the Slip Rating and Area lines. For a marble look wall, Kings Marble is the one listed for it.
Then choose the look. Southside gives the terrazzo pattern, Avalon gives a soft vein, and Burleigh gives a stone look with a cushioned edge across a wider run of colours. Set the joint last: wider for a softer, traditional look, narrower for a cleaner one.
For other stone looks and sizes, the tiles collection covers every shape and finish in the store.
