据记载,我国最早的游标卡尺是一千九百多年前新莽时期的铜卡尺,尺长14.22厘米,分固定尺和活动尺两部份,其结构原理和使用性能,同现在游标卡尺十分相似. According to records, the earliest Vernier caliper in our country was the copper caliper of the New Mang Period, which was more than 1900 years ago. It has a length of 14.22 cm and is divided into two parts: a fixed ruler and a movable ruler. Its structural principle and service performance are very similar to the caliper now.