You can view your ES index sizes by making use of your http API for ES, the url is on your dashboard. Simply change the path to
Based upon your retention plan we will automatically clean indexes after a certain amount of time.
Please note, currently any indexes not in the format indexname-yyyy.mm.dd will be automatically deleted. If you need to use custom index names that are either not time based or need to use a different format please contact support.
You can use the ES http api to delete indexes by name.