"VM.metaspace basic" is a variant of the "big" VM.metaspace report. It misprints the sizes of the chunk free lists:

thomas@mainframe:/shared/projects/openjdk$ jjjcmd stuefe VM.metaspace basic
12967:

Usage:
  Non-class: 12,83 MB capacity, 11,26 MB ( 88%) used, 1,54 MB ( 12%) free+waste, 35,69 KB ( <1%) overhead.
      Class: 1,37 MB capacity, 1,08 MB ( 79%) used, 287,62 KB ( 20%) free+waste, 12,94 KB ( <1%) overhead.
       Both: 14,20 MB capacity, 12,34 MB ( 87%) used, 1,82 MB ( 13%) free+waste, 48,62 KB ( <1%) overhead.

Virtual space:
  Non-class space: 16,00 MB reserved, 15,25 MB ( 95%) committed
      Class space: 1,00 GB reserved, 99,10 MB ( 10%) committed
             Both: 1,02 GB reserved, 114,35 MB ( 11%) committed

Chunk freelists:
   Non-Class: 280,75 KB <<<<<<
       Class: 12,21 MB <<<<<<
        Both: 12,48 MB <<<<<<

Compare with the non-basic command:

thomas@mainframe:/shared/projects/openjdk$ jjjcmd stuefe VM.metaspace
12967:

Total Usage ( 175 loaders):

  Non-Class: 571 chunks, 12,83 MB capacity, 11,26 MB ( 88%) used, 1,54 MB ( 12%) free, 480 bytes ( <1%) waste, 35,69 KB ( <1%) overhead, deallocated: 315 blocks with 75,33 KB
      Class: 207 chunks, 1,37 MB capacity, 1,08 MB ( 79%) used, 287,62 KB ( 20%) free, 0 bytes ( 0%) waste, 12,94 KB ( <1%) overhead, deallocated: 31 blocks with 11,12 KB
       Both: 778 chunks, 14,20 MB capacity, 12,34 MB ( 87%) used, 1,82 MB ( 13%) free, 480 bytes ( <1%) waste, 48,62 KB ( <1%) overhead, deallocated: 346 blocks with 86,45 KB

Virtual space:
  Non-class space: 16,00 MB reserved, 15,25 MB ( 95%) committed
      Class space: 1,00 GB reserved, 99,10 MB ( 10%) committed
             Both: 1,02 GB reserved, 114,35 MB ( 11%) committed


Chunk freelists:
   Non-Class:

 specialized chunks: 2, capacity 2,00 KB <<<<<<
       small chunks: 33, capacity 132,00 KB <<<<<<
      medium chunks: 33, capacity 2,06 MB <<<<<<
   humongous chunks: (none)
              Total: 68, capacity=2,19 MB
       Class:

 specialized chunks: (none)
       small chunks: (none)
      medium chunks: 3125, capacity 97,66 MB
   humongous chunks: (none)
              Total: 3125, capacity=97,66 MB

Waste (percentages refer to total committed size 114,35 MB):
              Committed unused: 304,00 KB ( <1%)
        Waste in chunks in use: 480 bytes ( <1%)
         Free in chunks in use: 1,82 MB ( 2%)
     Overhead in chunks in use: 48,62 KB ( <1%)
                In free chunks: 99,85 MB ( 87%)
Deallocated from chunks in use: 86,45 KB ( <1%) (346 blocks)
                       -total-: 102,10 MB ( 89%)