Exodus 28:16

14 and two chains of pure gold, made of braided cord work; and attach these chains to the settings.

15 You are also to make a breastpiece of judgment with the same workmanship as the ephod. Construct it with gold, with blue, purple, and scarlet yarn, and with finely spun linen.

It must be square when folded over double, a span long and a span wide.

17 And mount on it a setting of gemstones, four rows of stones: In the first row there shall be a ruby, a topaz, and an emerald;

18 in the second row a turquoise, a sapphire, and a diamond;

This was said to Israel at a particular time, so it is wise to read it together with the surrounding text. Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
It must be square when folded over double, a span long and a span wide.
KJV
Foursquare it shall be being doubled; a span shall be the length thereof, and a span shall be the breadth thereof.
WEB
It shall be square and folded double; a span shall be its length, and a span its width.
ASV
Foursquare it shall be [and] double; a span shall be the length thereof, and a span the breadth thereof.
DARBY
Square shall it be, doubled; a span the length thereof, and a span the breadth thereof.
BLB
It shall be square, doubled, a span its length, and a span its width.
ÅB
Den skal være firkantet og dobbelt lagt, et spann lang og et spann bred.
OTB
Den skal være firkantet, en håndsbredd lang og en håndsbredd bred, og brettet dobbelt.
B1930
Den skal være firkantet og dobbelt lagt, et spann lang og et spann bred.

Study notes (Tyndale)

Original text and word study