Sorting out CSS3 border-image

In the following examples, I am using this image (each circle is 20px in diameter)

A border image

For this first set, I am keeping the slice consistent at 25%.

Stretch Value no border-width border-width:10px; border-width:20px; border-width:40px; border-width:5px 10px 20px 40px
ROUND
REPEAT
STRETCH
SPACE

Varying the slice percentage

AT 50%, round
AT 33%, round
AT 33%, repeat
AT 33%, stretch
AT 20%, round
AT 20%, repeat
AT 20%, stretch