These slides accompany my talk from WordCamp Pittsburgh, available at the link below: https://wordpress.tv/2016/10/08/kevin-hoffman-demystifying-responsive-images-in-wordpress/ Whether you are an advanced WordPress theme developer or simply editing content from the dashboard, there is one question that everyone asks at one point or another: What size should my images be? This already complex question takes on a whole new dynamic with the recent addition of responsive images in WordPress 4.4. While the basic concept of responsive images may be easy to grasp, a true understanding of the inner workings is far more elusive. In this talk, we will demystify responsive images and learn how to strike a proper balance between image performance and image quality within any context.