Shipping Cookies By Mail is our specialty. We use the largest USPS Flat Rate Box and pack it full. A free custom greeting card with your message can also be included. If you're not sure what to choose, let us recommend sending. 12 Chocolate Chip, 6 Oatmeal Raisin and 6 Peanut Butter Cookies By Mail, and then we pack the left over space with 12 of our chewy, fudge brownies.