Smallest
Robert P. Munafo, 2012 Apr 16.
The term "smaller" is sometimes used in this encyclopedia to refer to a relationship between muatoms that are siblings: A muatom is "smaller" if it has a higher period. The word is used in this way on the pages: binary search for internal angle, common smaller neighbor, and smaller neighbor. See also larger.
R2.2/5a is "smaller" than R2.1/3a because it has a higher period
Being "smaller" in this sense does not necessarily mean that a muatom is physically smaller: for example, R2.1/7a is physically smaller than R2.3/8a, but is larger in the sense meant here, because it has a lower period.

In the images above, both muunits are shown at the same scale (image width and height are 0.1 units on the real and imaginary axis respectively). But the muatom with the higher period is also physically larger. This is a counterexample to the ordinary rule that siblings with a higher period are physically smaller. The discrepancy is accounted for by the sin(2π N/M) term in the "Milnor's approximation" formula shown in the secondary continental muatom article.
From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 19872017. Muency index
This page was written in the "embarrassingly readable" markup language RHTF, and was last updated on 2017 Feb 02. s.11