In Biblical days, the shofar was used in a variety of ways: The first and most important was to announce the onset of the beginning of the Sabbath and holidays. This was in pre-calendar days when people couldn't always be sure when the festival would begin. It would be used at the coronation of a king, or as a sound to rally to battle. It was used by Gideon (Judges 6 & 7) to confound the enemy, the Midianites, who so outnumbered Gideon's 300 men. It was used by Joshua to bring down the walls of Jericho.
Please note that we cannot guarantee an exact length, shape or thickness of the shofars and the length of the silver plating will also vary. Each one is unique and takes a lot of practice to learn how to blow.