Everything is inflated. Corners are enormous, edges are soft, and each shape looks like it was pressed out of plasticine about ten seconds ago.
Definition
Claymorphism takes neomorphism's soft moulded surface and refuses its two joyless constraints — the monochrome page and the invisible edge. Clay shapes are brightly coloured, sit clearly on top of the background, and are inflated rather than extruded. The signature is a double inner shadow: a light one at the top and a dark one at the bottom of the same element, which makes a flat rectangle read as a rounded pillow.
It surfaced around 2021, drafting off the 3D illustration boom — the era of pastel isometric scenes and rounded low-poly characters. Its natural habitat is onboarding screens, kids' apps, fintech that would like to seem harmless, and anything that wants to feel touchable rather than technical.
The rules
Twenty-four to thirty-two pixels on a button, thirty-plus on a card. If it still looks like a rectangle you have not gone far enough.
White inset from the top, a tinted dark inset from the bottom. That pair is the inflation. One alone just looks like a mistake.
Never black. Take the background hue, darken it, and drop it far and soft. Grey shadows make clay look like plastic.
Three or four candy colours used at full strength. Washed-out pastel plus soft shadow equals mush.
The material implies squash and stretch. An overshoot easing curve on hover is doing the same job the shadows are.
Specimen
Lowering the stakes. Clay is the fastest way to make a form feel like it will not judge you, which is why it keeps showing up in health apps, budgeting tools and anything aimed at children. It also solves neomorphism's contrast failure outright, because the components are actually a different colour from the page.
Density and seriousness. Those radii and that padding devour space, so a data table in clay is unreadable. And nobody wants their bank statement delivered on a marshmallow. It is a language for the first five screens, rarely for the hundredth.