The 30 minute modern glass sand timer measures 8"H x 3.15"Dia. This gorgeous sand timer is made with a hand crafted glass globe and is truly stunning. It is filled with white sand. It comes beautifully packaged in a black and satin-lined gift box. This is a very popular item for corporate events and parties. It makes an excellent gift for everyone from the graduate to the executive. Sand timers are aesthetically pleasing ornaments, rather than accurate timepieces. This sand timer is usually accurate to within 5 minutes.