Sleek C7 Postal Boxes – Premium Black Letterbox Boxes for St

Make every delivery stand out with our elegant C7 postal boxes — the ultimate choice for brands that care about presentation and protection. These black letterbox boxes are designed to fit large-letter size requirements, helping you save on postage while maintaining a premium look. Crafted from durable 1.2 mm cardboard, each large black box offers a smooth black finish outside and a clean white interior inside—perfect for gifts, jewellery, or boutique items. Deliver your products in style and leave a lasting impression with every unboxing.