Choosing the right countertop thickness isn’t just a design decision—it impacts your budget, structural support, and final aesthetic. In our 2025 guide, we compare standard thicknesses like 2 cm and 3 cm, explore how each material (granite, quartz, porcelain) behaves, and reveal how mitered edges can make a slab look up to 6 cm thick. Whether you’re remodeling a kitchen island or upgrading a bathroom vanity, learn how to match thickness to material, style, and performance so you get the look you want without compromising strength or cost.