Building materials · Reference
Ceramic and porcelain tiles use standard nominal formats — 300×300, 300×600, 600×600 and 600×1200 mm (12×12 to 24×48 in) — plus large-format slabs to 1600×3200 mm; wall tiles run 6–8 mm thick, floors 8–10 mm.
A tile is specified by its face length × width (the nominal size) plus a thickness; the actual work size is slightly smaller to leave room for the grout joint.
| Format | Metric (nominal) | Imperial (nominal) |
|---|---|---|
| Standard square | 300 × 300 mm | 12 × 12 in |
| Large square | 400 × 400 mm | 16 × 16 in |
| Standard large squareMost common floor format | 600 × 600 mm | 24 × 24 in |
| Extra-large square | 800 × 800 mm | 32 × 32 in |
| Rectangular / plank | 300 × 600 mm | 12 × 24 in |
| Large rectangular | 600 × 1200 mm | 24 × 48 in |
| Type | Metric (nominal) | Imperial (approx) | Thickness |
|---|---|---|---|
| Small square (wall) | 10 × 10 to 20 × 20 cm | ≈4 × 4 to 8 × 8 in | 6–12.5 mm |
| Medium square | 30 × 30; 60 × 60 cm | 12 × 12; 24 × 24 in | 9.5 mm |
| Large rectangular | 60 × 120 cm | 24 × 48 in | 8.5 mm |
| Large-format slab | 120 × 120 to 120 × 278 cm | ≈48 × 48 to 47 × 109 in | 6 mm |
| Extra-large slab | 160 × 320 cm | ≈63 × 126 in | 6 mm |
| Outdoor thick paver | 40 × 120; 50 × 100 cm | ≈16 × 47; 20 × 39 in | 20 mm |
Source: Marazzi — Tile Sizes (small / medium / great formats)
| Tile type | Thickness (metric) | Imperial (approx) | Typical application |
|---|---|---|---|
| Wall tile | 6–8 mm | ≈1/4–5/16 in | Backsplashes, shower walls, cladding |
| Standard floor tile | 8–10 mm | ≈5/16–3/8 in | Kitchens, baths, living areas |
| Heavy-duty / commercial floor | 10 mm+ | ≈3/8 in+ | Commercial floors, patios |
| Gauged porcelain panel (thin) | 3–6 mm | ≈1/8–1/4 in | Lightweight wall cladding |
| Gauged porcelain slab | 6–12 mm | ≈1/4–1/2 in | Countertops, large-format walls |
| Outdoor paver | 20 mm | ≈3/4 in | Outdoor / pedestal systems |
Source: FlooringClarity — Standard Porcelain Tile Thickness Guide
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For floors, 600 × 600 mm (24 × 24 in) is the most common square; 300 × 600 mm (12 × 24 in) is the most popular wall/plank format, with 300 × 300 mm (12 × 12 in) a long-standing standard.
Boxes list the nominal size, but tiles are made to a slightly smaller work size — a 600 × 600 mm tile typically measures 597–598 mm — and the difference is taken up by the grout joint (about +3 mm).
Wall tiles are usually 6–8 mm (≈1/4–5/16 in), standard floor tiles 8–10 mm (≈5/16–3/8 in), heavy-duty/commercial floors 10 mm or thicker and thin gauged porcelain panels 3–6 mm.
Gauged porcelain slabs go up to 1600 × 3200 mm (160 × 320 cm ≈ 63 × 126 in) at 6 mm thick, with intermediate slabs at 120 × 120, 120 × 240 and 120 × 278 cm.
The US calls sizes in inches (12 × 12, 12 × 24, 24 × 24, 24 × 48), but these are nominal — a 24 × 48 in tile actually measures about 23 5/8 × 47 1/4 in (≈60 × 120 cm).
TCNA rules require the joint to be at least three times the tile's facial-dimension variance and never less than 1/16 in; rectified floor tile uses a 1/8 in minimum (3/16 in for large format).
Every figure on this page is traced to a named source, linked under each table. Standard sizes come from published standards and established industry references; where a size is a typical range or varies by manufacturer, we say so. Sizes vary by region, model and revision — treat these as the standard reference, and confirm the exact spec of the item you are selling.
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