Reiss Boys Slim Cotton Rich Trousers (3-14 Yrs) - 4-5 Y - Grey - Available at M&S
These cotton-rich trousers from Reiss have a sharp, versatile look. They're cut to a modern slim fit, with centre front pleats for added refinement. The pair is complete with a neat concealed button and zip fastening and handy pockets on the side and back.