A stopper adapted for attachment with a plunger rod for use within a syringe barrel includes: a main body portion defining an open rearward end configured to receive the plunger rod and a closed front end and a stopper scale line formed along an outer edge of the main body portion. The stopper scale line is formed to provide a visual enhancement of a portion of the stopper that aligns with volume measuring demarcations provided along the syringe barrel, and the stopper scale line contrasts with the main body portion of the stopper.
