The top button can be fastened with a snap button. The inner tag is missing, so I can't tell you the material, but it's a general fabric for formal occasions. Thank you very much for browsing the product. You can buy it immediately. This account only deals with 100% genuine items. Please feel free to take a look at our high-end brand products that have maintained their strong popularity! ※This product may be removed from sale. 【Size】9 Shoulder width: 40cm Body width: 50cm Length: 50cm ※Measurements are taken flat. ※The total length of jackets and tops is measured from the shoulder. ※Accessories used in the photos are not included. ※We only conduct transactions with those who can accept a few centimeters of measurement error. We have had a cancellation due to a 1cm difference, so please understand that these are amateur measurements. ※There may be a smell of used clothing. We carefully inspect the items and include necessary information! We believe it will be a great deal for those who are satisfied with the condition♪ Some items are new and some are not, so please make your judgment based on the description and photos (*^^*) Please feel free to ask any questions! We try to ship as quickly as possible☆彡 (We may change from Rakuraku Mercari delivery to Yu-Yu Mercari delivery after purchase) Thank you for your consideration (*'▽')