diff --git a/AUTHORS b/AUTHORS
index 051f54b42..c03eb7161 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -11,6 +11,7 @@ Borg authors ("The Borg Collective")
 - Martin Hostettler <textshell@uchuujin.de>
 - Daniel Reichelt <hacking@nachtgeist.net>
 - Lauri Niskanen <ape@ape3000.com>
+- Abdel-Rahman A. (Abogical)
 
 Borg is a fork of Attic.
 
diff --git a/src/borg/helpers.py b/src/borg/helpers.py
index cf0af1e0e..89b557e57 100644
--- a/src/borg/helpers.py
+++ b/src/borg/helpers.py
@@ -20,7 +20,7 @@ import time
 import unicodedata
 import uuid
 from binascii import hexlify
-from collections import namedtuple, deque, abc
+from collections import namedtuple, deque, abc, Counter
 from datetime import datetime, timezone, timedelta
 from fnmatch import translate
 from functools import wraps, partial, lru_cache
@@ -1574,13 +1574,15 @@ class ItemFormatter(BaseFormatter):
         'source': 'link target for links (identical to linktarget)',
         'extra': 'prepends {source} with " -> " for soft links and " link to " for hard links',
         'csize': 'compressed size',
+        'dsize': 'deduplicated size',
+        'dcsize': 'deduplicated compressed size',
         'num_chunks': 'number of chunks in this file',
         'unique_chunks': 'number of unique chunks in this file',
         'health': 'either "healthy" (file ok) or "broken" (if file has all-zero replacement chunks)',
     }
     KEY_GROUPS = (
         ('type', 'mode', 'uid', 'gid', 'user', 'group', 'path', 'bpath', 'source', 'linktarget', 'flags'),
-        ('size', 'csize', 'num_chunks', 'unique_chunks'),
+        ('size', 'csize', 'dsize', 'dcsize', 'num_chunks', 'unique_chunks'),
         ('mtime', 'ctime', 'atime', 'isomtime', 'isoctime', 'isoatime'),
         tuple(sorted(hashlib.algorithms_guaranteed)),
         ('archiveid', 'archivename', 'extra'),
@@ -1630,8 +1632,10 @@ class ItemFormatter(BaseFormatter):
         self.call_keys = {
             'size': self.calculate_size,
             'csize': self.calculate_csize,
+            'dsize': partial(self.sum_unique_chunks_metadata, lambda chunk: chunk.size),
+            'dcsize': partial(self.sum_unique_chunks_metadata, lambda chunk: chunk.csize),
             'num_chunks': self.calculate_num_chunks,
-            'unique_chunks': self.calculate_unique_chunks,
+            'unique_chunks': partial(self.sum_unique_chunks_metadata, lambda chunk: 1),
             'isomtime': partial(self.format_time, 'mtime'),
             'isoctime': partial(self.format_time, 'ctime'),
             'isoatime': partial(self.format_time, 'atime'),
@@ -1679,13 +1683,23 @@ class ItemFormatter(BaseFormatter):
             item_data[key] = self.call_keys[key](item)
         return item_data
 
+    def sum_unique_chunks_metadata(self, metadata_func, item):
+        """
+        sum unique chunks metadata, a unique chunk is a chunk which is referenced globally as often as it is in the
+        item
+
+        item: The item to sum its unique chunks' metadata
+        metadata_func: A function that takes a parameter of type ChunkIndexEntry and returns a number, used to return
+                       the metadata needed from the chunk
+        """
+        chunk_index = self.archive.cache.chunks
+        chunks = item.get('chunks', [])
+        chunks_counter = Counter(c.id for c in chunks)
+        return sum(metadata_func(c) for c in chunks if chunk_index[c.id].refcount == chunks_counter[c.id])
+
     def calculate_num_chunks(self, item):
         return len(item.get('chunks', []))
 
-    def calculate_unique_chunks(self, item):
-        chunk_index = self.archive.cache.chunks
-        return sum(1 for c in item.get('chunks', []) if chunk_index[c.id].refcount == 1)
-
     def calculate_size(self, item):
         return sum(c.size for c in item.get('chunks', []))
 
diff --git a/src/borg/testsuite/archiver.py b/src/borg/testsuite/archiver.py
index adf85b7d6..cce0c92ff 100644
--- a/src/borg/testsuite/archiver.py
+++ b/src/borg/testsuite/archiver.py
@@ -1440,9 +1440,12 @@ class ArchiverTestCase(ArchiverTestCaseBase):
         self.cmd('init', '--encryption=repokey', self.repository_location)
         test_archive = self.repository_location + '::test'
         self.cmd('create', '-C', 'lz4', test_archive, 'input')
-        output = self.cmd('list', '--format', '{size} {csize} {path}{NL}', test_archive)
-        size, csize, path = output.split("\n")[1].split(" ")
+        output = self.cmd('list', '--format', '{size} {csize} {dsize} {dcsize} {path}{NL}', test_archive)
+        size, csize, dsize, dcsize, path = output.split("\n")[1].split(" ")
         assert int(csize) < int(size)
+        assert int(dcsize) < int(dsize)
+        assert int(dsize) <= int(size)
+        assert int(dcsize) <= int(csize)
 
     def _get_sizes(self, compression, compressible, size=10000):
         if compressible: