Your product image should have the following specifications:
the image size should be square, we recommend 1000 x 1000 pixels in size
the file size should be 1 MB or less. We recommend as small as possible, for the page to load more quickly.
file type .jpg, .jpeg, or .png
the file name should have NO special characters, including no spaces. If your file name has special characters or spaces, the file will NOT upload.
For details on how to upload a product image, see Adding Product Images article.