Tiffany & Co. is a luxury jewelry brand known for its exquisite craftsmanship and iconic blue boxes. They offer a wide range of jewelry including engagement rings, necklaces, bracelets, and earrings. Their sizing options vary depending on the type of jewelry, but they provide options to accommodate different preferences. Tiffany & Co. predominantly caters to a high-end clientele seeking timeless and elegant pieces that symbolize luxury and sophistication.