US Navy Blue Angles Once a Blue Angel Always a Blue Angel Challenge Coin. Coin is approximately 3 inches wide by 1.5 inches high. I sell high quality, desirable, collectible challenge coins. If you are looking for a specific coin for your collection, as a “memento” from a previous unit, to replace a coin that was lost, or for a gift, there is a good chance I may have it so please check my other listings! General Information & Frequently Asked Questions – Please read before you message me. I will not respond to any questions in regard to this policy. I will not disclose where I receive my coins from as that would be a bad business practice, so please don’t bother to ask! Additionally, I do not design, make, or engrave coins. For any questions not covered above.