If the button diameter measurement method has a vernier scale, it can be directly measured. If you don't have a vernier, you can place the button flat on the desktop, put a ruler at the bottom of the button, put a ruler to the right and left, vertical to the ruler at the bottom of the button, you can directly at the bottom of the ruler If you read the data and the ruler is not enough, the left and right rulers can be replaced by other straight objects. The ruler is perpendicular to the lower end of the ruler. Plain Fabric,Plain Organza Fabric,Plain Georgette Fabric,Plain Silk Fabric JIANGYIN JINPENG YANR-DYED FABRIC CO LTD , https://www.jinpengfabric.com
The above is a measure of the diameter of the button. I believe you already know how to measure the diameter of the button.
For more information, please visit: China Button Industry Network