Rivalry Threads 91 Iowa Hawkeyes Shirt Women's Size Small The Rivalry Threads 91 Iowa Hawkeyes Shirt is a women's size small shirt in gray color, perfect for football fans of the Iowa Hawkeyes. The shirt is designed to show support for the team and features the official team logo. Made by the brand Rivalry Threads, this shirt is a great addition to any fan's collection of college sports apparel. 3/4 Sleeve.