We recommend a pixel size of 1024 x 1280 for your picture and a 600 pixel width is the minimum size for uploading. If you do not know how to locate the pixel size of your photo, follow these steps: In WINDOWS: 1. Right-click on the picture when viewing it in your photo program 2. Select Properties 3. Look under 'Summary' for the height & width [dimensions] in pixels. On MAC: 1. Click the picture and 'Get Info' (Command-I). 2. Click 'More info' and look under 'Dimensions' for the height & width in pixels.