A product line’s width is a measure of the the variants of each product in the line. Variant can be options like color, size, add-ons or service bundles.
The width is related to a product line’s length – distinctly different products in the line.
The combination of a product line’s length and width contribute to the line’s complexity and costs, yet enable the line to better match customer needs, wants, and desires. Complexity cost is always in trade-off with customer satisfaction.