volumeSize property

The volume size, in Gibibytes (GiB).

This can be a number from 1-1,024 for standard, 4-16,384 for io1, 1-16,384 for gp2, and 500-16,384 for st1 and sc1. If you specify a snapshot, the volume size must be equal to or larger than the snapshot size.

Default: If you create a volume from a snapshot and you don't specify a volume size, the default is the snapshot size.

You must specify either a VolumeSize or a SnapshotId. If you specify both SnapshotId and VolumeSize, the volume size must be equal or greater than the size of the snapshot.