def get_size(conn, vm_):
    sizes = conn.list_sizes()
    vm_size = config.get_cloud_config_value('size', vm_, __opts__)
    if not vm_size:
        return sizes[0]

    for size in sizes:
        if vm_size and str(vm_size) in (str(size.id), str(size.name)):
            return size
    raise SaltCloudNotFound(
        'The specified size, \'{0}\', could not be found.'.format(vm_size)
    )
Return the VM's size object
dataset/ETHPy150Open saltstack/salt/salt/cloud/libcloudfuncs.py/get_size