A standard, also called a pizaine, was a collar of mail often worn with plate armour.
The standard protected the throat and neck and usually extended over the shoulders; it was in use from the 14th to the 16th century.
It was called a standard because the part encircling the neck and throat was able to stand upright without any external stiffening.
The lower, shoulder-covering, part of the standard was of 4-in-1 linked mail.
Standards were frequently worn with helmets that did not afford integral neck and throat protection, such as the sallet, barbute, and kettle hat.