Tatting Thread Color Samples

I like to have color samples of my tatting threads to help me choose threads for future projects.  I decided to use a rings-only edging pattern for the samples, as it shows the colors the way they come off the ball of thread.  A motif of rings and chains tends to chop up the colors.

I found this pattern on a Russian website through Pinterest.

Here's my version:
R: 2 ± 7 - 2 - 7. RW.  Leave unworked thread space of 3-4 mm.

Repeat R for desired length, joining Ring 3 to Ring 1 and Ring 4 to Ring 2, etc.

When I tat this with Lizbeth size 20, one sample uses about 3 yards 6" of thread.