curl 'www.example.com:9200/_cat/indices?v'
output:
health status index pri rep docs.count docs.deleted store.size pri.store.size
green open logstash-2016.07.21 5 1 4760 0 4.8mb 2.4mb
green open logstash-2016.07.20 5 1 7232 0 7.5mb 3.7mb
green open logstash-2016.07.22 5 1 93528 0 103.6mb 52mb
green open logstash-2016.07.25 5 1 20683 0 41.5mb 21.1mb
Reference Link: Here