- Design Advice
Large format porcelain slabs: sizes, thicknesses and where to use them
Sizes, thicknesses, finishes and slip ratings for every range in the Pyro + Echo Slab Collection, and where each slab fits.
Updated November 2026
Quick answer: Pyro + Echo's large format porcelain slabs run from 375 x 750mm up to 1620 x 3240mm, and most ranges are 6mm thick. Use 6mm slabs on walls and over existing surfaces, and the 12mm and 20mm sintered stone slabs for worktops, vanities and heavy-use floors.
This guide covers the ranges in the Slab Collection: the sizes they come in, how thick they are, their finishes and slip ratings, and where each one fits.
Sizes
Most porcelain slab ranges come in a standard set of sizes. Verde St Denis, Statuario Altissimo, Platinum White, Palladium Grey, Premium White, Fior di Bosco, Sahara Noir and Calacatta Macchia Vecchia come in seven sizes: 375 x 750, 750 x 750, 750 x 1500, 1200 x 1200, 1200 x 2700, 1500 x 1500 and 1500 x 3000mm.
Ranges such as Tropical Black, Calacatta Oro, Calacatta Viola, Rosso Imperiale, Vogue and Alaska White come in five of those sizes, without 1200 x 1200 and 1200 x 2700mm. Ultra Con.Crea. adds 1000 x 1000, 1000 x 1500 and 1000 x 3000mm.
The largest slabs are single-size ranges. Panda White Marble is 1600 x 3200mm. Diamond comes in 1200 x 3000 and 1620 x 3240mm, and Grande Lume in 1200 x 2780, 1600 x 3200 and 1620 x 3240mm. The sintered stone ranges, such as Calacatta Gold Sintered Stone, are 3200 x 1600mm.
Thicknesses
Most porcelain slabs are 6mm thick. I Naturali and Ossido are 5mm slabs at 1000 x 3000mm. Grande Lume comes in 6mm and 12mm, and I Travertini in 6, 9, 12 and 20mm. The sintered stone ranges come in 6, 12 and 20mm.
Where to use them
Pyro + Echo's large format slabs are used on walls, floors and kitchen and bathroom worktops, and outdoors. For the sintered stone ranges, the 6mm slabs suit wall cladding and refurbishments over existing surfaces. The 12mm and 20mm slabs are for worktops, vanities, splashbacks and heavy-use floors.
Large slabs cover walls and floors with very few joints. Bookmatched slabs let the veining mirror across a feature wall: Panda White Marble and Diamond have Face A and Face B slabs, and Sodalite Blue has a 1500 x 3000mm bookmatch.
Finishes and slip ratings
Finishes include natural, polished, silk, matt, soft and lapped. Many polished slabs have no slip rating in the range table, so check the table before using one on a floor. Ranges with a rating include Premium White, Fior di Bosco and Ultra Con.Crea. (R9) and Breccia Sarda (R10 A+B). I Travertini has ratings up to R11 A+B+C, including an anti-slip finish. On the sintered stone ranges, the Matt finish is rated R9 in 12mm and 20mm. Read our slip rating advice before choosing a slab for a wet floor.
Fixing large format slabs
Each range page lists recommended installation products, including Dukkaboard panels as the background and Dukkaboard Aqua77 for waterproofing. For adhesives, read Trimline's guide to the best tile adhesive for large format porcelain. Our Pyro + Echo FAQs cover samples, lead times and technical support.
Ranges to look at
| Range | Sizes and thickness | Finishes and slip rating |
|---|---|---|
| Verde St Denis | 7 sizes, 375 x 750 to 1500 x 3000mm; 6mm | Natural |
| Premium White | 7 sizes, 375 x 750 to 1500 x 3000mm; 6mm | Natural, polished, silk; R9 |
| Ultra Con.Crea. | 8 sizes, 375 x 750 to 1500 x 3000mm; 6mm; 5 colours | Soft; R9 |
| Calacatta Oro | 5 sizes, 375 x 750 to 1500 x 3000mm; 6mm | Polished |
| Panda White Marble | 1600 x 3200mm; 6mm | Polished, bookmatched Face A and B |
| Diamond | 1200 x 3000 and 1620 x 3240mm; 5mm | Several finishes incl. bookmatched; R10 |
| Grande Lume | 1200 x 2780, 1600 x 3200, 1620 x 3240mm; 6 and 12mm | Polished |
| I Naturali | 1000 x 3000mm; 5mm; 7 colours | Natural, polished, bush hammered; R9 or R10 |
| I Travertini | 300 x 600 to 1600 x 3200mm; 6, 9, 12 and 20mm | Soft, natural, anti-slip; R9 to R11 A+B+C |
| Calacatta Gold Sintered Stone | 3200 x 1600mm; 6, 12 and 20mm | Polished, Silk 3D |
FAQs
What is the largest porcelain slab Pyro + Echo supplies?
The largest slabs are 1620 x 3240mm, in Diamond and Grande Lume. Panda White Marble and Grande Lume also come in 1600 x 3200mm, and the sintered stone ranges are 3200 x 1600mm.
How thick are large format porcelain slabs?
Most of our porcelain slabs are 6mm thick. I Naturali, Ossido and Diamond are 5mm, Grande Lume comes in 6mm and 12mm, and the sintered stone ranges come in 6, 12 and 20mm.
Can large format porcelain slabs be used on floors?
Yes, but choose a finish with a suitable slip rating, because many polished slabs have no rating listed. On the sintered stone ranges, the Matt finish is rated R9 in 12mm and 20mm and is the one for floors. See our slip rating advice.
Do you supply bookmatched slabs?
Yes. Panda White Marble and Diamond come as bookmatched Face A and Face B slabs, and Sodalite Blue has a 1500 x 3000mm bookmatch. The sintered stone ranges are also available as bookmatched pairs.
Which adhesive should I use for large format slabs?
Each range page lists recommended installation products, including Dukkaboard panels and Validus adhesives. For a full comparison of adhesives for large format porcelain, read Trimline's guide to the best tile adhesive for large format porcelain.
