On ruler in plain English it is the line between 1/4" and 1/2". It was easy for me to find and understand. I m 61 yrs old, so I need plain English.
Can you show me 3/8 inch on a ruler?
1 inch = 2.54 cm，3/8*2.54=0.9525,so 3/8inch is about 0.95 cm,you can find 0.95cm on a ruler.