Theory Shirts first surfaced on Chictopia's streetstyle gallery in Summer 2009 seen on blogger UnoCosa. She wore her yellow Theory silk with snaps shirt with a black vintage short gloves sleeve cropped sweater and brown vintage wide lege cuffed pants. Since then, Theory Shirts have grown in popularity as bloggers from Los Angeles, San Francisco, and Boston have discovered them. Theory Shirts are generally seen in casual, chic, and business casual style. Popular types of Theory Shirts are silk with snaps, plaid button down, grey button down, blouse, and plaid. Blogger's favorite colors are white, black, light blue, and navy.
There are currently 75 streetstyle photos of bloggers wearing Theory Shirts. Most recently, blogger DavieandErica of lpfashionphilosophy.blogspot.com wore her Theory grey button down shirt with a Levis dark denim skinnies jeans, thrifted vintage wool blazer blazer, and H&M black vest vest.