Furniture with soft, rounded curves best soften room edges by breaking up sharp, boxy lines. Curved sectionals, rounded sofas, and circular side tables create smooth, inviting transitions within a space. These shapes make rooms feel cozy and approachable, which aligns with the fall 2025 interior design trend focused on warmth and comfort. Pairing curved furniture with polished nickel accents further enhances the sophisticated yet lived-in look.