Went and box it up. Using the coke hat as our example. Let's wait and box it up, turn on the scale and make sure it's zeroed out. Place the hat on the scale, it reads 2.2 ounces. I make a note of that wait. Now let's get a box big enough that the hat will not get crushed.
I have an eBay box that needs to be built. I seal it up using my free eBay tape. When you have an eBay store, you are given a coupon every quarter that allows you to get eBay branded supplies. Totally worth it. I love my eBay tape. It's important to think how the package will be received by your buyers.
Will they be happy with the protection inside the package? It'll take a little practice. Then taking my eBay branded tissue paper, I put it around the hat. And then I placed the hat into some plastic protection. I use the premise that it's raining everywhere my package will be delivered. Even if that's not the case, I don't want anything to get wet and damaged.
Put it into the box, add a few air bags. I reuse the ones that come to me and delivery packages and from friends who save them for me. Add the weight of a blank shipping label and business card which I always put into the package and it comes to 9.8 ounces. The label and card can add point four ounces so it may tip the scale to the next ounce. Round up to two 10 ounces, and that can be shipped via first class. Using USPS.
The box is sturdy enough to keep the hat from being crushed.