To list all disk types available in your project in all regions. Result is truncated.
$ gcloud compute disk-types list
NAME ZONE VALID_DISK_SIZES
pd-balanced 10GB-65536GB
pd-ssd 10GB-65536GB
pd-standard 200GB-65536GB
pd-balanced 10GB-65536GB
...
To list a specific region, use the filter option.
$ gcloud compute disk-types list --filter="zone~'us-central1'"
NAME ZONE VALID_DISK_SIZES
pd-balanced us-central1-a 10GB-65536GB
pd-extreme us-central1-a 500GB-65536GB
pd-ssd us-central1-a 10GB-65536GB
pd-standard us-central1-a 10GB-65536GB
pd-balanced us-central1-b 10GB-65536GB
pd-extreme us-central1-b 500GB-65536GB
pd-ssd us-central1-b 10GB-65536GB
pd-standard us-central1-b 10GB-65536GB
pd-balanced us-central1-c 10GB-65536GB
pd-extreme us-central1-c 500GB-65536GB
pd-ssd us-central1-c 10GB-65536GB
pd-standard us-central1-c 10GB-65536GB
pd-balanced us-central1-f 10GB-65536GB
pd-extreme us-central1-f 500GB-65536GB
pd-ssd us-central1-f 10GB-65536GB
pd-standard us-central1-f 10GB-65536GB
pd-balanced us-central1-d 10GB-65536GB
pd-extreme us-central1-d 500GB-65536GB
pd-ssd us-central1-d 10GB-65536GB
pd-standard us-central1-d 10GB-65536GB
To a list a specific region and local SSDs only.
gcloud compute disk-types list --filter="zone~'us-central1' AND name~'local-'"
NAME ZONE VALID_DISK_SIZES
local-ssd us-central1-a 375GB-375GB
local-ssd us-central1-b 375GB-375GB
local-ssd us-central1-c 375GB-375GB
local-ssd us-central1-f 375GB-375GB
local-ssd us-central1-d 375GB-375GB