If you're in a thrifty mode, this Aqua Choker will fit the bill. It's a foolproof choice, while not very costly. Another smart option is this Jules Smith Designs Necklace. While the price is rather reasonable, be sure that this piece will become a great addition to your wardrobe. Or you can choose this Nadri Choker - be sure you'll be making a stylish addition to your wardrobe.
If you can afford to spend a little more, take a look at this Necklace. While the price is very reasonable, this item is an easy wardrobe update. Also consider this Necklace. It's an attractive option both price and quality-wise.