Quantity   Component name
1 × 10 mm Square Button <a target="_blank" rel="noopener noreferrer" href="http://www.adafruit.com/products/1010">http://www.adafruit.com/products/1010</a>
1 × 11.5 mm (diameter) Round Buttons <a target="_blank" rel="noopener noreferrer" href="http://www.adafruit.com/products/1009">http://www.adafruit.com/products/1009</a>
1 × 16 mm Illuminated round button <a target="_blank" rel="noopener noreferrer" href="http://www.adafruit.com/products/1477">http://www.adafruit.com/products/1477</a>