The standard Dekton thicknesses

Dekton is produced in a range of thicknesses to suit different jobs, from slim cladding to substantial worktops. The common options are 4mm, 8mm, 12mm, 20mm and 30mm, though availability varies by colour and collection. For kitchen worktops, the two everyday choices are 12mm and 20mm.

12mm or 20mm for a worktop?

Both make excellent worktops; the choice is mostly about look and a little about robustness. A 12mm top gives a slim, modern, minimalist profile and uses less material. A 20mm top has a more substantial, solid presence and a touch more robustness at exposed edges. Many contemporary kitchens favour 12mm for a sleek line, while those wanting a weightier, traditional feel lean toward 20mm. Your fabricator can show you both so you can judge in person.

Getting a chunky look with a built-up edge

Want the drama of a thick, solid worktop without the cost and weight of a very thick slab? That is exactly what a mitred, built-up edge achieves. Two pieces are joined at a precise 45-degree mitre so the edge appears far thicker than the slab itself, commonly creating apparent thicknesses of 40mm, 60mm, 80mm or more. Because many Dekton colours run through the body, these mitred edges look seamless. It is the most popular way to get a bold island edge, and we explain it further in edge profiles.

How thickness affects price

Thicker slabs use more material and, with mitred edges, more fabrication time, so they cost more than a slim 12mm top. A built-up edge adds the price of the extra material and the skilled mitre work. None of this is dramatic, but it is worth factoring in when budgeting, especially across a large kitchen or island. See our cost guide for context, and remember 0% finance is available.

Thickness, weight and support

Thicker tops and built-up edges are heavier, which makes sound cabinets and proper support for overhangs all the more important. A good installer accounts for this as a matter of course. For the bigger picture on slab dimensions, see Dekton slab sizes and lengths, and for fitting, how Dekton worktops are installed.

Thickness and the overall look of your kitchen

Thickness is one of those details that quietly shapes the character of a kitchen. A slim 12mm worktop reads as crisp, contemporary and architectural, pairing well with handleless units and minimalist schemes. A 20mm top, or a built-up mitred edge, feels more substantial and grounded, suiting both modern islands and more classic designs. Neither is better; it is about the look you want, and seeing samples at different thicknesses in your own light makes the decision much easier.

Splashbacks, upstands and cladding

Thickness is not just a worktop decision. Thinner 4mm and 8mm Dekton is ideal for full-height splashbacks, slim upstands and cladding, keeping these vertical surfaces neat and lightweight while matching your worktop colour for a coordinated look. Running a Dekton splashback up behind the hob in the same colour as the worktop is a popular, low-maintenance choice precisely because the surface is non-porous and wipes clean, as covered in how to clean and care for Dekton.

Getting advice on the right spec

Choosing between 12mm, 20mm and a mitred build-up, and deciding which thickness to use where, is exactly the kind of thing a good fabricator helps with. The right answer depends on your design, budget and how you use the kitchen. We are happy to talk it through and show you the options side by side, and the choice ties closely to edge profiles and overall cost.