Small Parcel Boxes & Mailers

Our Small Parcel range covers cardboard boxes, poly mailers, and book wraps sized to fit within Royal Mail's Small Parcel limits (max 450 x 350 x 160mm, up to 2kg) — helping you avoid Medium Parcel postage rates while comfortably accommodating bulkier items. Popular with online retailers shipping clothing, books, homeware, electronics accessories, and gift sets, this range includes single-wall and double-wall corrugated boxes, lightweight poly mailers for soft goods and apparel, and self-adhesive book wraps that mould around books, games, and media for secure, snug transit. Need something flatter? Browse our Large Letter mailers. Sending bigger items? See our Medium Parcel and Large Parcel ranges, or check our postal sizes guide.