Kutoka 28 : 16 Exodus chapter 28 verse 16

Kitakuwa mraba, tena cha kukunjwa; urefu wake utakuwa shibiri moja, na upana wake shibiri moja.
soma Mlango wa 28

It shall be square and folded double; a span{A span is the length from the tip of the thumb to the tip of the little finger when the hand is stretched out (about 9 inches or 22.8 cm.)} shall be its length of it, and a span its breadth.