How to make this intersection chart? I want to prepare the following chart. Say, I have three datasets of different lengths, for example:

A = [c,d,e,g,h,o,m,n,o,x,y,z]
B = [d,e,f,g,h,i,j,k,l]
C = [a,b,c,d,e]


Any dataset might contain items already there in other 2 datasets. Now I want to show the size of each dataset as a circle. More items, bigger circle. But all three circles also overlap each other depending on how much items are common. As demonstrated below.



What this chart is actually called? And what library can I use which might have this kind of chart available?
Thanks to @Peter. It's called Venn Diagram and here's my needed Javascript Library. https://www.benfrederickson.com/venn-diagrams-with-d3.js/