These are vintage Lucite Lilies in the Medium 17mm size. These lovelies come in Clear Frosted. I pair them with Swarovski Crystal teardrops Art. 5500 12mm size shown in AB.
You can also layer the flowers as shown in the second pic. This is a small flower inside of a large flower with a 9mm teardrop inside. Think of all the color combinations you can come up with!