As you choose a necklace length, consider what you plan on wearing it with. If your neckline is low, a longer necklace or a chain with a pendant can shine bright. For higher necklines, a shorter necklace or choker may be the best option.
If you have a favorite necklace, give it a quick measure. Etsy sellers often offer multiple lengths to choose from, or you can request a custom length if you have something specific in mind.