sgdisk --verify --print /dev/loop1
Creating new GPT entries.

No problems found. 1981 free sectors (990.5 KiB) available in 1
segments, the largest of which is 1981 (990.5 KiB) in size.
Disk /dev/loop1: 2048 sectors, 1024.0 KiB
Logical sector size: 512 bytes
Disk identifier (GUID): 15DB89A4-732D-4B07-813B-3DFB4311400A
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 2014
Partitions will be aligned on 2048-sector boundaries
Total free space is 1981 sectors (990.5 KiB)

Number  Start (sector)    End (sector)  Size       Code  Name