Robustly constructed from stainless steel, these 7 giant silver buttons have a pleasingly rounded discus shape with smooth seamless edges and are graduated in size from 50mm to 140mm diameter. Having a metal construction makes our Sensory Buttons highly durable and with a deluxe feel. They are lightweight, smooth and compellingly tactile to handle. The polished mirror surface provides a slightly curved and distorted reflection which is fascinating for children to observe. Ideal for inspiring creative language, using in imaginative play and constructing fun wobbly stacking towers. Diameter: 1.9", 2.6", 3.2", 3.75", 4.3", 4.9", 5.5"