Medium Parcel Boxes & Mailers

Our Medium Parcel range covers cardboard boxes, poly mailers, and book wraps built for items that exceed Small Parcel limits but stay within Royal Mail's Medium Parcel dimensions (max 610 x 460 x 460mm, up to 20kg). This range suits a wide variety of ecommerce shipments — from multi-item orders and larger homeware to shoes, bulkier apparel, and gift hampers. Choose from single-wall and double-wall corrugated boxes for added strength during transit, heavy-duty poly mailers for soft goods and clothing, and larger book wraps for multi-item media orders. For smaller sends, see our Small Parcel packaging; for oversized items, browse our Large Parcel range or our full postal sizes guide.