The green marble/brass 60 minute hourglass measures 10"H. The hand blown glass is filled with white sand and sits on a green marble base with three brass columns supporting it. It is a beautiful and fun gift for all those who love the sea, sailing and boats. This is a very popular item for corporate events and parties. Hourglasses are aesthetically pleasing ornaments, rather than accurate timepieces. This hourglass is usually accurate to within 5 minutes.