Redondillas are strophes of four eight-syllable (or sometimes six-syllable) verses which rhyme as follows: a b b a. Cuartetos are strophes of four hendecasyllables with the rhyme-scheme a b b a. It is not customary to put a final word that is aguda in the uneven verses of compositions written in hendecasyllables, or in verses that rhyme with them.

First Class: Verses of eleven syllables which have the sixth syllable and the tenth syllable stressed are hendecasyllables of the first class.