The shoulder-pieces were the two cloth straps of the high priest’s ephod. They passed over the shoulders from the back to the front and were fastened there. Two stones bearing the names of six tribes of Israel each were attached to them as memorial stones.
The shoulder-pieces formed part of the high priest’s sacred clothing. The stones on them represented the tribes of Israel as memorials before the Lord, and woven bands connected them with the breastplate.
The pieces were described as a precious linen texture worked with gold, blue, purple, and scarlet. The precise form and method of attachment are not clear from the descriptions.