The first edge of the label from the web is called the leading edge, depending on which way round the label is oriented, the leading edge is either wide or narrow. Thus in the first example the label is described as NEL or narrow edge leading. In the second example the label is described as WEL or wide edge leading. These terms are universally applied in the roll label market.
When labels are rewound, prior to delivery to the client, there are eight standard positions in which the labels can be wound. Please see the chart, this illustrates exactly which way around the label will be oriented when it comes off the roll. This is vitally important. Since in many instances it cannot be corrected after delivery. If machine applied, only one position can be correct. Please note: these positions 1-8 are an industry agreed standard.
When a roll label is described the first number used is the width of the label across the web, and the second number is the length of the label along the web.