Synthetic Opal Stone Dimension: Approx 13 mm- 14 mm. Adjustable Sterling Silver Box Chain available in 18cm and 22cm. Please have a look at our store for an expanding range of Jewellery. - Packaging: Each item is packaged in our branded packaging, so your order is ready to be gifted. If the gift item is going straight to the recipient, please leave a comment at checkout so we don't include an invoice. - Shipping: All items are ready to be shipped within 2 working days unless otherwise stated. For customers in the UK, your order shall arrive within a week, though in most cases it's much faster. Get in touch if your order is time sensitive, and we will do our best to help. For customers outside the UK, your order can take 1-4 weeks, so it's best to leave plenty of time, 80% of orders arrive within 2 weeks. During the Christmas period, please check our shop announcement for cut-off dates. -Get in touch if you have any questions. I will get back to you asap!