What should the administrator do to allow sales users to add custom sizing to the total opportunity sale?

To allow sales users to add custom sizing to the total opportunity sale, adding custom sizing as a new product in a pricebook is the most effective approach. This method enables sales users to offer varied sizing options directly as part of their sales transactions, ensuring these options are recognized within the sales process and associated with opportunities.

When custom sizing is established in the pricebook, it becomes readily available for selection during the creation or update of opportunities. This integration allows for accurate tracking of inventory, pricing, and revenue forecasting based on the specific products sold.

Creating a new custom object related to opportunities or adding a new field labeled custom sizing would not effectively integrate custom sizing into the sales process as seamlessly as using the pricebook. These approaches might require additional steps for users, complicating the sales workflow and potentially leading to inconsistencies in data management.

By incorporating custom sizing directly into the pricebook, the administrator simplifies the process for sales users and ensures better alignment with existing product offerings. This option promotes streamlined customization that can directly influence the total sale on opportunities.