A salt spoon is a miniature utensil used with an open salt cellar for individual service. It is a historical and nostalgic item from a time before table salt was free-flowing, as it is today. The spoon itself ranges from 2 to 3 inches (5 to 7.5 cm) long and has a circular bowl measuring approximately 0.5 to 0.75 inches (1.25 to 2 cm). They can be found in a wide range of materials including glass, Sterling silver, plastic, wood, ivory, bone and shell. As a unit of measurement in old recipes, 1 salt spoon (ssp) = 0.25 teaspoon, or slightly more than 1 ml.