Seeing that i cant put anymore pics up I did a dime,penny and nickle test dime and penny fit with room to spare and the nickle was a bit to big,I hope this helps in someway.
thanks for doing the coin test. I have a size 7 ring and when i laid the penny on top of it , it was the same with as the whole ring. would not go into it. so your ring must be more of a 8 or 9. that might help get more bids.