It's a pair of aerator sandals Easy to use - just attach spikes to the sole of your shoe An easy way to spike your garden lawn Increase oxygen levels in your soil - great Compatible plant growth Increase water and nutrient penetration 4, 2 cm spikes on each sandal One size fits all The straps Compatible secure attachment Sturdy and durable Material: Plastic + Nylon + Steel Nail Size: 30 x 13 cm / 11.8 x 5.1' G.W.: Approx. 0.5 kg Color: Dark Green Package Included: 1 Pair of Lawn Aerating Shoes Note: Please allow 2-3cm difference due to manual measurement. Besides that different computers display colors differently, the color of the actual item may vary slightly from the following images (1 inch = 2.54 cm), thanks Compatible your understanding.