CSS3 Grid Images - Fluid Scale, Responsive
The images in this demo fluidly scale down in size as the browser width decreases.
Standard <img> tags are not constrained to the grid which allows them to flow around differently sized neighbours. This may not be desirable behaviour, so here's a demo using background-images that counters that.
More demos and snippets
Did you find this useful? There are more demos and code snippets this way.