While making the background for the barrettes using the Herkimer Diamonds, I had left over sheets of cane slices to make other barrettes.  Here is one with two butterflies floating through the field.

The barrette back is one that will work very well with thick hair.  It is only three inches long, like the ones that i use for most of the barrettes I make.  The difference is the opening where the hair is held is over 1/2 inch wide.  This allow it to comfortably hold more hair then the others.