It's only been tried on. 40mm 41mm Materials: SUS 316 Stainless Steel / Aluminum / TPU About this product: [Structure prioritizing device protection] The case protecting the device has a double structure, with TPU material on the inside to prevent the device from being scratched during attachment and detachment, and aluminum on the outside for a light and modern feel. [Carefully selected SUS316 premium stainless steel] The band uses SUS316 stainless steel, a higher-grade material than general stainless steel, offering superior corrosion and pitting resistance compared to commercially available products. [Precise cutouts] Designed with precise cutouts, considering the ease of pressing the device's digital crown and buttons. [Equipped with strong neodymium magnets] The band's clasp is equipped with strong neodymium magnets, allowing for safe use without the band accidentally coming off. [High edge design for screen protection] The case's edge is designed to be high to maximize the prevention of scratches on the screen.