1) Be sure to specify your ring size and year at check out on each particular item. Please read the descriptions carefully. Certain coins can only be made in certain sizes. Also not all years are available in all coins due to the changing of materials in certain years. For example, nickel is a metal which does not form well at all. Many coins switched from silver to nickel in the mid 1960s
2) Shipping time varies from approximately 7 to 14 days depending on where you live. As all rings are custom made to order this includes the time to actually make your ring.
3) Returns and resizing: If for whatever reason you are not happy with your ring send it back for a full refund. I do not cover the shipping cost for returns. For most accurate ring size, please get sized at any jewelry store. They all carry sizing rings and most should be happy to let you try them. Another option is to buy your self a sizer from Amazon. They are relatively inexpensive. If the ring is a surprise gift for a family member another option is to "borrow" one of their other rings and measure it at this site: www.findmyringsize.com
This will give you a pretty close measurement but is not the most accurate. If you happen to need your ring resized in most cases I can do that and charge $20 for this.
Please let me know if you have any other questions.