To change your bottle size or product quantity, follow these steps:1. Log in to your Gemmist account: https://www.gemmist.com/account/login2. Scroll down to the HAIRCARE ARRIVING order. 3. Find the product you would like to change, and tap Update amount.4. Update the size and quantity of your order.If you are still having issues, contact our Customer Support team at support@gemmist.com.Support Hours:Mon-Fri: 10am-5pm PST