Fermentation glass Jar Weights 3" Hexagon (2) Made in the USA will fit inside many gallon size pickle jars, and half gallon jars with the same size lid. This weight is Hexagonal in shape. It measures 3" from flat side to flat side, and about 3.5" from point to point. These have a slight green color to them because of the type of glass used Lead free Glass, will not fit Mason jar wide mouth or standard mouth