Timer very convenient to use, lets you see the time pass so very educational for children and all those who have no sense of time (eg, teenagers on their computer or game console ...). The "minus": the "ticking" is a bit too noisy to concentrate if they are used for work. Practical kitchen, the "ticking" no longer troublesome. This article seems solid, check the last. The "plus": its modern design is appreciable. While turning up the timer on first use. Dimensions: diameter 8 cm, height 4 cm. I recommend this article!