To get information about a dimension

The following describe-dimension example gets information about a dimension named TopicFilterForAuthMessages.

aws iot describe-dimension \
    --name TopicFilterForAuthMessages

Output:

{
    "name": "TopicFilterForAuthMessages",
    "arn": "arn:aws:iot:eu-west-2:123456789012:dimension/TopicFilterForAuthMessages",
    "type": "TOPIC_FILTER",
    "stringValues": [
        "device/+/auth"
    ],
    "creationDate": 1578620223.255,
    "lastModifiedDate": 1578620223.255
}

For more information, see Detect Commands in the AWS IoT Developer Guide.