This tutorial is not longer needed from version 1.8.0!!
With Yasr Pro you can upload your own image to use a stars set. Yasr supports 3 different size: “Small”, “Medium” and “Large”.
For the small size, the single icon must be 16×16 and offset between images is 5: the finished image must be 16 width and 58 in height. File name must be stars_16.png
For the medium size, the single icon must be 24×24 and offset between images is 5: the finished image must be 24 width and 82 in height. File name must be stars_24.png
For the large size, the single icon must be 32×32 and offset between images is 5: the finished image must be 32 width and 106 in height. File name must be stars_32.png
Remember: First star is the empty one, second appears when mouse is hover and last is the one showing rating. Images MUST be .png
When your images are ready upload stars_32.png inside the directory wp-content/uploads/yasr/thumb of your website. Rename the uploaded image in the set name, for example my_custom_set.png. Now go up one dir ( wp-content/uploads/yasr/ ) create a new folder, and it’s name MUST be the image set name: in our example we’re gonna call it my_custom_set (without extension). Now upload your 3 custom images (stars_16.png, stars_24.png, stars_32.png) in the new directory.
You’re done now, you just need to select the new set in the yasr settings.