These garden hoops are made from plastic-coated fibreglass, and each measures 165cm long - when bent into an arch shape, they stand 60cm tall and provide the framework for constructing your own plant tunnel. Simply push the stakes firmly into the ground, then cover with garden netting, plastic or fleece (not included) and you have a fully functioning grow tunnel. The plant tunnel hoops work directly in the ground, but can also be used in raised beds as a simple and inexpensive way of adding a protective cover for your offerings. Please note: care must be taken when removing the hoop stakes from their packaging - they are kept under tension for shipping purposes and can spring open quickly if not opened carefully.