According to industry statistics, the sale of individual consumer flat irons increased by 20 million units between 2009 and 2010, with numbers continuing to rise with each year since. Today, the industry sells the staple hair styling product in a wide array of colors and designs with 60% of sales coming from the fashion designed versions. With the plethora of products available for consumers to purchase, consumers often have a difficult time deciding which product is best for their hair, says Holly Springer, creator of Hair Styling Girl (hairstylinggirl.com), a online review site of straighteners and flat irons.