Launching a physical product line with custom designs is exceptionally affordable through print-on-demand. The process is simple: you supply the artwork, and the printing provider produces and fulfills each item only as orders arrive. This model removes the need for upfront inventory, warehouse storage, or holding unsold stock in unpopular sizes.

However, this convenience comes with higher unit costs, as printers factor inventory risk management directly into order pricing. Account for this from the start by calculating margins before beginning the design phase. Doing this upfront clarifies which items are financially viable.

Let’s begin with that calculation.

Select a single product to offer. For most sellers, a classic unisex T-shirt is a great starting point.…