Hope this helps: Flat rate is easy but sometimes a lightweight item can go 1st class mail package or priority mail much cheaper. Have your item and all packing together and weigh it, so you have an exact weight. If a person asks you for exact shipping, request their zip code. Then go to USPS.com, choose "calculate a price", then type in the weight and their zip code and you can see the cheapest option and give them a quote. Good luck and welcome!