Measurements: 6mm width, 2mm thickness. Ring Material: Aluminium. Great alternative to silver, lightweight, tarnish free, hypoallergenic, recyclable. Items are hand stamped, one character at a time. Stamps will have varying degrees of depth & irregular spacing. Hand stamping is much more forceful than engraving & the impressions are much deeper. These are not considered defects. Once an order is made it cannot be changed. Orders are made exactly as is, with all spelling & grammar errors assumed to be intentional. Please spell check before ordering. I do not recommend these items are worn in water. Over time the black enamel may fade, this can be rectified by colouring over the letters with a permanent marker, then polishing off any excess once dried with a microfibre cloth. Sunglasses Adjustable Ring, Silver Colour Hand Stamped Ring