Looking for a secure, sustainable postal box optimised for smaller items and Royal Mail small parcel dimensions? These 200 x 100 x 100mm eco-friendly postal boxes from our Priory Elements range combine robust corrugated cardboard construction with genuine environmental credentials — built to protect your products in transit and the planet at the same time.

Constructed in a FEFCO 0427 style, these self-assembly postal boxes are designed to fit within Royal Mail small parcel size guidelines, helping you minimise postage costs without compromising on protection. Supplied flat packed in bundles of 40, they're ideal for high-volume despatch operations where speed, efficiency, and storage space all matter.

Made from sustainably sourced recycled materials, these cardboard postal boxes are 100% plastic-free, fully recyclable, and biodegradable — a complete sustainable packaging solution for businesses looking to reduce their environmental footprint without sacrificing quality.

Through our partnership with 1% For The Planet, 1% of every sale across all Priory Elements ranges is donated to environmental charities tackling the world's most pressing ecological challenges — so every box you buy makes a measurable difference.

Browse our full Priory Elements range to explore more planet-friendly packaging solutions built for modern, responsible businesses.