This is a set of 30 small 100ml bottles. 【Size per bottle】 Height: 112.2mm Body diameter: 50mm Outer diameter of the mouth: 28.3mm Inner diameter of the mouth: 18mm Weight: 135g These were used for practice, decanting wine into these small bottles for the second-stage Sommelier and Wine Expert exams. After use, they were washed with neutral detergent, dried, and stored at home. We recommend sterilizing them by boiling before use for peace of mind ^^ The bottles are quite strong, but please note that some of the aluminum lids have scratches or dents. The lids are gold in color.