Traceable to Zen Buddhist aesthetics, wabi-sabi originally described the tea ceremony's appreciation for an irregular bowl or a crackled glaze. Applied to interiors, that same eye picks a surface that shows the maker's hand over one polished perfectly smooth.
Typical materials include rough lime-plaster texture, unevenly finished raw wood, and kintsugi-style ceramics where a crack is rejoined with visible gold. Colors stay in low-saturation naturals — clay, sand, deep gray — and fabrics like linen are left to wrinkle naturally. Placement tends toward a natural asymmetry rather than a mirrored layout.
It's often confused with minimalism, but the two aim at different things. Minimalism removes the unnecessary for a clean look; wabi-sabi is closer to leaving what's old and worn exactly as it is, letting the passage of time stay visible.
When to use
Use it to soften a look that feels too polished and brand-new. The trick is actively avoiding perfect symmetry and the glossy sheen of anything freshly made.