The Polaroid tile layout uses css3 to create a polaroid like gallery with your K2 content. There are three image sizes available based on the number of columns assigned to your leading, primary and secondary content. eg for smaller images use more columns - 4 or 5. For larger images use a smaller number of columns - 1 or 2.
For best results use the K2 image only or use a small amount of text for each item.