Promotion for US Customers: If you are a dealer based in the USA and not an Inside member, we will reimburse you 50% of the shipping costs for each order. 2 anti-stress balls made of olive wood. The diameter of the balls is approximately 3.5 cm. The olive wood is untreated and only treated with a little olive oil to protect it from drying out. Here you can find our care tips. Since all olive wood products vary in color and grain, each photo is just an example. The actual product is always unique. Due to the intricate handcrafting and the growth of the olive wood, the products often differ in shape, and the size specifications can only be approximate. NO perfect balls due to handcrafting. Delivery WITHOUT black box!!!