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X dimension

In barcode technology, the X dimension is the narrowest part of a barcode's symbology

The X dimension is used to determine a barcode's density, which is the amount of information that can be captured in a barcode within a specific amount of space. Other elements of a bar code are expressed as multiples of the X dimension. For instance, to ensure accurate scanning, most bar codes have a quiet zone whose width is 10X, or ten times the bar code's X dimension. In general, the greater the X dimension, the easier it is to scan a bar code.

This was last updated in October 2009

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If taking linear barcode types for example, there are two types of barcode: two-width barcode and multiple-width barcode. A two width barcode is composed of barcodes with bars with width of X and nX, such as Code 39; while a multiple-width barcode is composed of bars with width of x, ax, bx, cx, etc, such as <a href="http://www.yiigo.com/guides/vbnet/how-to-generate-code-128.shtml">Code 128</a>.
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