The way to determine how large we can print with your image is to first find out what the pixel dimensions are. Once you have this info, divide the number of pixels by 150, this will tell you how large in inches that we can print. For example, a 3600x5400 pixel image, divided by 150, equals 24x36. This is the max size we can print. We can go larger but please know we are losing resolution past 24x36, you could probably push this to 30x40 and it would still look good.