I am a current Sooner! I live in Norman and they don't have anything here but Jason White football jerseys at Wal-Mart and the smallest size fits my doxie/chi! I do have a link here....
http://teacupspuppies.com/Tee-Shirts%20Page%202.htm . They have OU and OSU t-shirts and jerseys and they are super affordable! I already got mine so I can sneak Linus into the game and no one can kick him out. Boomer Sooner and have fun shopping!