The pocket watch is approximately 2.5cm in diameter. The chain is approximately 80cm long. You can adjust the time by pulling out and turning the crown. After adjusting, push the crown back in and the second hand will start moving. Please note that it is not waterproof. As you can see in the image, a case is not included. I also have wristwatches and pocket watches for sale♪ Check them out with the hashtag below! #Chouko'sWatchesAndPocketWatches A list of items for women is compiled under the following tag: #Chouko'sLadiesItems A list of items for men is compiled under the following tag: #Chouko'sMensItems Stylish Pendant Accessories Retro Analog