Purpose. This specification defines guidelines for choosing sizes of printed wiring boards, using standard fabrication panel sizes.

Recommendation. While this document should be helpful in establishing areas of concern in choosing a PWB size, the designer should consult with the manufacturer to verify that his capabilities, and restrictions, are similar to those used in this document

Clarifications. This document makes an assumption that the designer is free to choose any size board desired. This freedom is not true often due to the particular needs of the product being designed. However, an understanding of the principles in this guidelines can be of use to the designer because it affords and overview of manufacturing requirements to the design community.

It should also be noted that the limits listed in this document are appraisals of what is generally available at most companies, using normal techniques. Under special conditions, using special tooling and equipment, many things are possible that far exceed what is normally done. These special designs are usually not desirable because of cost or reduced producability.

The main emphasis of this document is toward rigid materials commonly available. Flexible and/or special materials often are available in