Final answer:
The common photo size for attachment to legal documents like licenses, certificates, or permits is 2 inches by 2 inches. The photo is typically placed at the top or the front side of the document in a designated area, as specified by the issuing authority.
Step-by-step explanation:
The size of the photo that should be attached to a license, certificate, or permit often varies by issuing authority and region. However, a common photo size that is widely accepted is a passport-sized photograph, which is typically 2 inches by 2 inches (51 mm by 51 mm). This ensures clarity and sufficient detail of the face for identification purposes.
The placement of the photo is also crucial and is usually specified by the issuing organization. In most cases, the photo should be placed in a designated area, which is often at the top or the front side of the license, certificate, or permit, where it can be readily seen without obstructing any vital information. It's important to follow the specific guidelines given for the document in question to ensure compliance with official standards.