The website istockphoto.com contains thousands of reasonably priced stock photos of snowmen. Another popular source for stock images is Getty, which features hundreds of snowmen photos. Though Getty can be expensive, it is considered the industry standard. Alternatively, the website Pixabay offers dozens of free stock photos of snowmen.
If a photo is sourced from pixabay or another free stock website, be certain to read up on the image's copyright status. Most free stock photos allow commercial use, with a requirement that the photographer must be credited somewhere on the page. As snowmen are a popular subject, most free and paid stock photo sites feature numerous different images to choose from.