lsblk
I found a way to check the size of all disk partitions very efficiently. Let's see the command.
[grid@primary01 ~]$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 6.3T 0 disk
├─sda1 8:1 0 18.6G 0 part
├─sda2 8:2 0 18.6G 0 part
├─sda3 8:3 0 18.6G 0 part
└─sda4 8:4 0 6.3T 0 part
sdb 8:16 0 6.3T 0 disk
├─sdb1 8:17 0 18.6G 0 part
├─sdb2 8:18 0 18.6G 0 part
├─sdb3 8:19 0 18.6G 0 part
└─sdb4 8:20 0 6.3T 0 part
...
Not only size, we also see the major number and minor number of partitions.