If you're in a thrifty mode, this adidas Knitted Hat will fit the bill. It's a great choice, while not very pricey. In this price range, you can also look at this Topman Beanie Hat. It's also a popular item and won't break the bank. You might also want to consider this '47 Hat. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you have enough to afford it, then you won't be disappointed if you check out this Gucci Beanie. It's an expensive but smart option. While you're at it, also have a look at this Thom Browne Knitted Hat. Yes, this item is expensive, but it does not mean it's not worth it. And one more item you might be interested in is this Loro Piana Beanie Hat. 'Cause you deserve nothing but all the finer things!