Swarovski stones (for nails) are named after their cut, size, and color/special effect. The cut is the design, which is always labeled as a 4-digit number starting with 2. If the stone number does not start with 2, it is not a flat back. Most stones have a name but some discontinued stones were only labelled with the number. Stone 2028 is no longer produced and never had a name. The round stones you will use most frequently are 2000 Rose, 2058 XILION Rose, and 2088 XIRIUS Rose.
Sizes of stones are easy to remember once you start using them. The smallest round stone offered by Kreativ Nail Supply is ss5. The largest offered is ss48. The smaller the number, the smaller the stone. If you see a stone sized using "SS", it is always a round stone. The sizes you will use most frequently are ss5, ss7, and ss9. You will use larger and smaller stones, but come on, how many ss34 stones can you fit on one finger? Any non-round stone will be measured by their dimensions in milimeters (7.5mm, 6x1.7mm, etc).
Ill write more blogs going into detail on certain cuts, shapes and sizes. Don't forget to subscribe to my blog, so you can stay up to date.