On the receipt of Uniqlo, the commodity number will generally be marked with "commodity number", "commodity number" or "product number". You can look for these signs on the receipt, usually followed by a number or a combination of numbers and letters. The product number is the unique identification of Uniqlo products, which is used to distinguish different styles, colors and sizes. If you want to find the specific item number, you can use the item number to search in Uniqlo official website or APP.