5 MINUTE SAND TIMER SIZE: 2.8x5.1 inch. Made of premium metal & high borosilicate glass. The 5 min hourglass makes it easy to track your work, measure your progress.Suitable for birthday, exquisite ...

The traditional sand timer, known colloquially as an egg timer, served its purpose well over the centuries since its development. However, [MakerPaul] realised it had some significant flaws that were ...