A porcelain slab is a very large porcelain tile, pressed and fired in one piece, with water absorption of 0.5% or less. Common sizes run from 800x1600 mm up to 1600x3200 mm, and the most usual thickness in Morbi is around 9 mm.
The US standard ANSI A137.3 gives a useful working definition: a tile panel or slab is one with a face area of one square metre or more. Anything smaller is a large-format tile, not a slab.
What slabs are used for
Slabs let you cover floors and walls with very few joints. They also replace natural stone and engineered quartz on many surfaces:
- Floors in homes, hotels, offices and shops, where fewer joints give a cleaner look.
- Feature walls, shower walls and lift lobbies, often with a marble-look print.
- Kitchen worktops, islands and splashbacks, usually in thicker slabs.
- Table tops, vanity tops and furniture panels.
- Facade cladding on ventilated systems, where the design and fixing allow it.
Thickness and body by use
Each use needs a different thickness and body type. A 6 mm slab can suit a wall, while a worktop usually needs a thicker slab and careful fabrication. Our guide to porcelain slab thickness covers the options.
Sizes you will see from Morbi
As of October 2026, Morbi sellers commonly list these sizes. Not every plant makes all of them, because the press, kiln and cutting lines set the limits.
- 800x1600 mm, the smallest common slab and the easiest to handle and ship.
- 1200x1800 mm, often used for walls and bathroom panels.
- 1200x2400 mm, a popular floor and wall size that covers a full room height in many homes.
- 800x2400 mm and 800x3000 mm, narrow, tall formats for walls and cladding.
- 1600x3200 mm, the largest size in regular trade, used for worktops and book-matched walls.
How sizes are written
Sizes are written in millimetres, short side first. Our guide to 800x1600, 1200x1800 and 1200x2400 slab sizes explains what the numbers mean in practice, including inches and square metres per slab.
What changes with size
Bigger slabs are harder to make well. Flatness, shade consistency and edge quality all become more demanding as the panel grows. Handling and shipping risk rises too, because a long slab bends and cracks more easily if it is lifted wrongly.
Size also decides who can install it. A 1600x3200 mm slab needs lifting frames, suction cups, at least two trained fitters and a very flat substrate. Your customers need to know this before they buy.
Packing changes as well. Smaller slabs may travel in boxes on pallets. The larger sizes travel on edge in A-frames or wooden crates.
How to choose sizes for your range
Start with your market. Ask which sizes local fitters can handle, which sizes your competitors stock, and whether customers want slabs for floors, walls or worktops. Then match each size to a factory that makes it on its own lines.
Ask each plant for its size list, thickness options per size, body type and packing method. Compare those answers before you look at any quote. See the slab range we cover on our ceramics sourcing page.
Next step
We find plants that make your slab sizes in-house, check samples and test reports, and supervise packing and loading. To plan a slab range for your market, book a free sourcing review.