When using a BLOB field, which statement about data size is true?

The statement that BLOBs have unlimited storage size is accurate because BLOB (Binary Large Object) fields are designed to store large amounts of binary data, such as images, audio, video, or other unstructured data. The actual limit on the size of a BLOB data type can depend on the database system being used; however, in general usage, BLOBs can accommodate significantly large volumes of data compared to traditional data types.

This capacity allows developers to store extensive files without the rigid restrictions typically associated with other data formats, making BLOBs particularly useful in applications requiring management of substantial multimedia content. The nature of BLOBs being able to handle larger data sizes effectively positions them as a flexible option for data storage in many scenarios.

In contrast, the other statements do not align with the characteristics of BLOB fields. For instance, they do not have a fixed size, they are not limited to small amounts of data, and while they may require specific handling for retrieval and manipulation, the concept of "unlimited" in this context refers to a much larger scale than other data types typically allow.