CORE supports a 1:1 aspect ratio logo of 125 x 125 pixels and a maximum file size of 2 MB. You can use .bmp, .png, and .jpg file formats for logos. If the aspect ratio of your logo image is different from what CORE requires, the logo image will be skewed to the 1:1 ratio and appear distorted. Check CORE Help Center for details.
CORE Help Center