300mm x 300mm Tiles

Matte tiles are trending strongly in Australian bathrooms for their contemporary look and practical ability to hide water spots and fingerprints. Gloss tiles reflect light and can make a bathroom feel brighter and larger, but show water marks and smudges more readily. For shower recesses and wet floors, matte or satin finishes with good slip resistance are generally preferred.

Measure your total wall and floor surface area in square metres, then add a 10–15% wastage allowance for cuts, breakages, and future repairs. For complex layouts with diagonal patterns or feature inserts, increase the wastage to 15–20%. Always order all tiles from the same batch (check the shade lot/batch number) as tiles from different batches can vary slightly in colour.

Floor tiles must have an adequate slip resistance rating (P3 minimum for domestic bathrooms) and be durable enough for foot traffic. Wall tiles can be glazed ceramic, porcelain, or natural stone, they don't need to carry load but should be moisture-resistant. Many Australian renovators choose matching or coordinating floor and wall tiles from the same range for a cohesive look.

For small bathrooms, tiles between 300 x 300mm and 600 x 300mm often work well on both walls and floors. Smaller mosaic or subway tiles (75 x 150mm or 100 x 200mm) are a classic choice for shower walls. While large format tiles can also work in small spaces, they require a very level substrate and expert installation. Avoid tiles that are too small on floors (like 50 x 50mm mosaics) in large quantities, as the increased grout lines can make a space feel busier.

The most effective approach is to choose one feature zone and use your feature tile there, a full-height shower wall, the bath surround wall, or the vanity splashback area. Keep the remaining surfaces in a neutral or complementary field tile. This creates impact without visual clutter. Limit your palette to two or three complementary materials for a cohesive result.

Australian Standards (AS 4586) require bathroom floor tiles to have a minimum slip resistance rating of P3 for domestic bathrooms and P4 or P5 for wet areas like shower recesses. The Blue Space recommends checking the slip resistance rating of any tile you're considering for floor use, particularly in the shower. Matte and textured porcelain tiles generally offer better slip resistance than polished or gloss finishes.

Porcelain tiles are fired at higher temperatures and are denser, less porous, and harder than ceramic tiles. This makes porcelain more water-resistant, more durable, and suitable for both indoor and outdoor applications, including high-traffic floors. Ceramic tiles are lighter and easier to cut, making them a practical choice for bathroom walls and splashbacks. For bathroom floors and wet areas, porcelain is generally the preferred option in Australia.

300 x 300mm is one of the most versatile mid-size formats, commonly used on bathroom and laundry floors, shower walls, and kitchen splashbacks. It's large enough to cover a floor without an excessive number of grout lines, but small enough to handle steps, drainage falls and tight room shapes more easily than a large-format tile, which makes it a practical default for smaller or more irregular rooms.

It sits in the middle. It's larger than small-format tiles (roughly 100mm to 200mm) and mosaics, but well short of large-format tiles, which typically start around 600mm and can run much larger again. That middle position is exactly why it's such a common choice: fewer grout lines than a small tile, but without the very level substrate and specialist handling that large-format tiles need.

A 300 x 300mm tile covers 0.09 square metres, so it takes just over 11 tiles to cover one square metre before allowing for cuts and waste. Add a wastage allowance, typically 10 to 15% for a simple rectangular room and up to 20% for a room with diagonal cuts, angles or a feature pattern, and always order from the same batch to avoid shade variation across the job.

Yes, which is part of why this size is so widely stocked. A floor application needs a tile with an adequate slip resistance rating for the room, particularly in a wet area like a shower, while a wall tile has more flexibility in finish since it isn't underfoot. Many ranges offer a 300 x 300mm tile rated for both, which makes it straightforward to run one product across an entire bathroom.

It's generally more forgiving to install than a large-format tile, since a smaller tile is easier to handle, cuts more easily around fittings and drains, and doesn't demand the near-perfectly flat substrate that large-format tiling requires to avoid lippage. Standard adhesive and notched trowel techniques suit this size well, which is one reason it remains a common choice for DIY-adjacent renovations, though a professional tiler is still recommended for wet areas and floor falls.

Both are common mid-size formats, but 300 x 600mm is rectangular rather than square, which changes the laying pattern (often a brick or stacked bond rather than a simple grid) and covers more area per tile, meaning fewer grout lines overall. Choosing between them usually comes down to the proportions of the room and the pattern preferred, since both sizes carry similar durability and slip-rating options depending on the specific range.