How to calculate the size of the button

For the daily purchase of buttons, the most basic need to understand is the type and size of the buttons. Then the question is, the size of the button should be like

What measure?

Model Model Diameter D Model

Model

Diameter D Model Model Diameter D 14# 8.9 30# 19.05 48# 30.5 16# 10.2 32# 20.32 54# 34.3 18# 11.4 34# 21.6 60# 38.1 20# 12.7 36# 22.86 70# 44.5 22# 13.97 38# 24.13 80# 50.8 24# 15 40# 25.4 90# 57.15 26# 16.51 44# 27.8 100# 63.5 28# 17.78 280# 409# 380# 408#

Below is a size comparison chart for all of the following:

EMF Boxer

Shandong EMF New Material Technology Co., Ltd , https://www.earthingsilver.com