If you are on a limited budget, your best bet is this Dondup Beanie. It's a fantastic product, while not very pricey. It is also worth considering this Stussy Beanie. It's a product you'll love which also doesn't cost too much. You may also want to look at this Knitted Hat. This item is not expensive either, but it will make a difference in your wardrobe.
For something in the middle of the price range, we recommend taking a look at this Oamc Beanie. While the price is very reasonable, this product is an easy wardrobe update. It is also worth checking out this Emporio Armani Beanie. It's an attractive option both price and quality-wise. Take a look at this Hat too! Great value for your money.