Originally there's only 4a nd 4b. But 4a coils can be pretty big compared to my penspring nd smaller coils. So I think some people describe tiiny coils as 4b nd kinky lil to no definition as 4c
Originally Posted by coilypoo
This is the definition I used to go by...but still confusing because people go by clumping as well.

Although I don't know about 4c