You asked for 16, I went way too far
And I gave you 28, just to raise the bars

from Big Daddy Kane – 28 Bars Of Kane Lyrics on Rap Genius

Meaning

He was supposed to do only 16 bars, or lines, for this song
But he “raised the bar” (pun) by doing 28 bars

Also this song is dedicated to the shoes Air Jordan 28’s

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