Where can I place my logo on a product?

Short answer: Every product offers its own placements — heart, chest, back, sleeve, thigh… You can see them in the product configuration, and some of them are mutually exclusive.

A placement is a predefined marking position on a product: heart, chest, upper back, middle of the back, sleeve, forearm, thigh, side… You do not drop a logo wherever you like: you enable one of the placements the product offers.

Which placements are available depends on the product — a bag, a cap and a t-shirt do not offer the same ones. The real list appears in the product configuration.

Some placements cannot be used at the same time. When you enable one, the incompatible placements turn grayed out: that is not a bug, it is a manufacturing constraint.

Every placement has a maximum size: on a cap, for example, the marking cannot be taller than 5 cm or wider than 9.5 cm. That is one of the two reasons logo versions exist — see What is a logo version and why are there several.