This set includes a monitor, keyboard, and mouse. They are 1/12 scale, which is the most common scale for dollhouses and dollhouse miniatures. It means that if an object is 12 inches in real life, it is sized down to a one inch as a miniature. They measure: 

• Monitor: 1-1/4" W x 1-1/2" H
• Keyboard: 1-1/4" W