a measuring device for measuring the thread start distance of a thread formed on an outer surface of a container finish is provided . the measuring device includes a base having a first surface for receiving a rim of a container finish , a support member , a gauge , and a counterweight to balance the measuring device on the finish . the support member is movably attached to the base and adjacent the first surface . a side surface of the support element is in contact with the container finish . the gauge is attached to the base and a gauge actuator having a roller contact member is operatively associated with the gauge . the gauge actuator measures the distance between the rim of the container finish and a thread start point of the thread of the container finish , s - dimension , as the gauge actuator moves along an upper base line of the thread .