Napkin rings come in various materials like brass, wood, marble, and travertine. Brass rings, such as the Tyra or Moss sets, are durable, slightly heavy, and add a classic metallic touch to table settings. Wooden rings offer a warm, natural aesthetic but need occasional care to avoid drying or cracking. Marble and travertine rings, like the Bree and Hana sets, bring elegance and are great for formal dining. Each material has its own style and maintenance needs, so you can pick one that suits your table and routine best.