This Bronzed 30 Minute Hourglass measures 3" x 5.25". This 18th century industrial designed hourglass consists of hand blown glass that is filled with white sand. The hourglass sits on a wood base with four bronzed columns supporting it. It is a beautiful and fun gift. 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.