KVM/qemu-img/qemu-img info

qemu-img^[1] info IMAGE_NAME

 $ qemu-img info test.vmdk 
 (VMDK) image open: flags=0x2 filename=test.vmdk
 image: test.vmdk
 file format: vmdk
 virtual size: 20M (20971520 bytes)
 disk size: 17M

 $ qemu-img info image-qcow.qcow2
 image: image-qcow.qcow2
 file format: qcow2
 virtual size: 10G (10737418240 bytes)
 disk size: 136K
 cluster_size: 65536

 $ qemu-img info MY_image-qcow.qcow2
 image: MY_image-qcow.qcow2
 file format: qcow2
 virtual size: 20G (21474836480 bytes)
 disk size: 7.5G
 cluster_size: 65536
 Format specific information:
    compat: 1.1
    lazy refcounts: true
    refcount bits: 16
    corrupt: false

Notes:

Encrypted information will be available only if the image is encrypted (The use of encryption in qcow and qcow2 images is considered to be flawed by modern cryptography standards)
Snapshot list: A list of all internal snapshots

See also