The placement of an image on a shirt depends on a few different factors, such as the size and design of the image, as well as the size and cut of the shirt. As a general rule of thumb, the lower the image placement on the shirt, the more it will be visible. For small images, such as designs and logos, it is recommended to keep them somewhere towards the top of the shirt, around the chest area. For larger images, such as full-size photographs, it may be best to place them farther down on the shirt, just above the mid-way point on the shirt. Ultimately, when deciding the placement of your image on the shirt, you should consider the overall look of your design and the visual impact you want to achieve with your shirt.