The size of the invoice pad is 3.4x5.5 inches.Thank you receipt book is compact and portable,easy to put in backpacks,handbags and pockets,making it very convenient to use.Perfect for small businesses: Provide exquisite receipt books for convenience stores,restaurants,flower shops,bakeries and boutiques,etc.The order form pad can be easily removed and perfectly transferred to the yellow copy paper.Invoice Books are both practical and aesthetically pleasing,adding a touch of color to your financial management of your small business.