A stanza's form is denoted by the number of lines within each stanza. In regards to Mbuyiseni Oswald Mtshali's poem "An Abandoned Bundle," there are five stanzas which each contain a different number of lines.
The first stanza contains six lines. This set of six lines in poetry has many different names: sexain, sixain, sextet, and sestet.
The second stanza is composed of two lines. This coupling of lines is called a couplet. In regards to this poem, the couplet does not rhyme and it is called an unrhymed couplet.
The third stanza is composed of four lines. A four line stanza is called a quatrain.
The fourth stanza contains nine lines. A nine line stanza in poetry is typically referred to as a Spenserian Stanza (although the poem's rhyme does not follow the typical rhyme scheme of the Spenserian Stanza: ababbcbcc).
The final stanza contains four lines. Again, this is called a quatrain.