This flower necklace matches my Mexican Flower bracelet. It measures 15 inches, but can be made to size for you. Because they are handmade yours might not look exactly like this, but it will be pretty dang close. I will gladly send you a picture before purchase. If you custom order it usually only takes a day or two for me to finish a piece, but depending on my other orders it can take up to 10 days, so order ahead! You can always contact me before buying to see how long I think that it will take. If you're not sure if it will fit, take a string starting at the back of your neck (where a clasp would be), wrap it around and your neck at the length that you would want the chain part to hang and end at the same spot where you started, then measure the string.
The progressive change of the colors also represents the slow change to higher notes on the piano. The reflection of a source of sunlight in the piano keys and the back of the picture display the strong colors (that may get out of control) that hit you as you see a rainbow.