25karats.com is an online jewelry retailer founded in 2008, specializing in custom-made engagement rings, wedding bands, and fine jewelry. Based in New York’s Diamond District, the company offers over 100 variations for each ring design, allowing customers to personalize their pieces with different metals, widths, and finishes. They provide a 60-day money-back guarantee, free resizing, and lifetime warranty, ensuring a seamless and secure online shopping experience.