Post Box Red Large Clown Flower Button. 64 mm Post Box Red £0.75 Quantity: at £0.75 each Add To Basket 0 in your basket View Basket Checkout A gorgeous big and bright Post Box Red Clown flower button. This one is slightly darker than the Geranium. Each button has 4 holes and measures 64 mm. These are perfect for Cushions,Bunting and Cardmaking projects.