What makes a t-shirt business successful?

Question

What makes a t-shirt business successful?

Answer 1

first off is having designs that people want to buy...

colors and sizes that they will buy

location, location, location

having large and x-large black, and white, shirts with ed roth type designs at a car show, will sell out

small pink ones, with feminist sayings, at the same show will not sell....

Answer 2

That is a loaded question.  What exactly are you doing (Custom prints, trade shows, schools, business) ?