Typically, we keep the backside of the t-shirt empty. There are no designs. And we make the design for the front side only. However, if the message is larger, we break that down and apply on the front side, as well.
For the client needs, we can make the design visible in both the parts (front and back of the t-shirt). So, you need not worry about the design space. Our expert t-shirt designers will cover you from every direction in case of necessities.