Band is 1.2mm thick. Main stone is 2 x 4mm. Stamp: SRS 925 - our Silver Rain Silver branded stamp. The ring is made with solid sterling silver and best kept in a sealed bag when not wearing. It's hypoallergenic. In the event of tarnishing, simply clean your silver with silver polish cloth. The gold version has a 18ct gold coating over sterling silver. Not sure about your size? We got a ring sizer ( US sizes) that is on offer when you buy with any other purchase: https://www.etsy.com/uk/listing/998153587/us-ring-sizer-uk-seller-us-sizes-for?ref=listings_manager_grid ♥ Packaging: All our jewellery comes with our branded velvet bag so your item is ready to be gifted. ♥ To read more about our production process visit our blog: https://www.silverrainsilver.com/blogs/production-methods/production-method-1-lost-wax-casting ♥ Instagram: Silver_Rain_UK