Thank you for viewing my items from among many others. The size is about 2.5cm wide. The hair tie rubber band can be replaced. You can replace it by threading and tying a rubber band that is not looped. I make each item with care, but as these are handmade, please understand that there may be minor imperfections (such as air bubbles). If you purchase two or more items, you will receive a 50 yen discount. Please let me know the numbers of the items you would like to purchase together in the comment section. I will create a combined listing for you. Please note that items may be removed without notice as they are also listed on other sites. Thank you for your understanding.