This mailer box is made of high‑quality corrugated cardboard with 3‑ply E‑flute, available in regular, medium‑duty and extra‑hard grades. Sturdy and anti‑deformation, it features great compression and load‑bearing performance to protect items during transit. Factory direct supply with competitive price. Custom sizes, styles and full‑color printing with your logo are supported. Ideal as colorful mailer boxes, Amazon‑ready rigid shipping boxes and rigid cardboard jewelry boxes, perfect for jewelry, small gifts and e‑commerce shipments for both cross‑border and domestic markets.