Cheer on your Sooners as they play in the Big 12 Championship by shopping our collection of Oklahoma Big 12 Championship t-shirts and more. Show up in classic game day style with a new Oklahoma Sooners shirt from our shop at Lids.com. Our assortment of Oklahoma shirts come in a variety of styles and sizes that all show off official University of Oklahoma colors and graphics. From casual Oklahoma Sooners short-sleeve tees to long-sleeve shirts, we got you covered for any time of the season. For those hot game days, snag a comfortable Oklahoma tank top. Be sure to check back for new arrivals of Oklahoma t-shirts so you're ready for every event throughout the season.