General description Aerating the lawn can be easy with these spiker shoes. Attaching to any size of shoe with the 'one size fits all' straps, these shoes have 13 spikes each and together, can give the lawn a thorough aeration without you breaking a sweat. Technical specifications Dimensions: 30cm D x 13cm W x 9cm H Spike dimensions: 5cm long x 4mm wide Number of spikes per shoe: 13 Installation Requires simple home assembly to attach the spikes to the bottom of the shoes.