Reiss Boys Wool Blend Suit Waistcoat (3-14 Yrs) - 11-12 - Dark Blue - Available at M&S
This wool-blend waistcoat from Reiss is a refined style for formal occasions. Its single-breasted design fastens with a neat row of buttons, and features a smooth satin back. Front welt pockets add traditional tailoring-inspired detail to the look.