By the second half of the 15th century, tabards, now open at the sides and so usually belted, were also being worn by knights in military contexts over their armour, and were usually emblazoned with their arms (though sometimes worn plain). The "Oxford English Dictionary" first records this use of the word in English in 1450. Tabards were apparently distinguished from surcoats by being open-sided, and by being shorter. In its later form, a tabard normally comprised four textile panels – two large panels hanging down the wearer's front and back, and two smaller panels hanging over his arms as shoulder-pieces or open "sleeves" – each emblazoned with the same coat of arms. Tabards became an important means of battlefield identification with the development of plate armour as the use of shields declined. They are frequently represented on tomb effigies and monumental brasses of the late 15th and early 16th centuries.