diff --git a/.code-samples.meilisearch.yaml b/.code-samples.meilisearch.yaml
index 8c05c952..2f4ecc95 100644
--- a/.code-samples.meilisearch.yaml
+++ b/.code-samples.meilisearch.yaml
@@ -240,9 +240,9 @@ reset_displayed_attributes_1: |-
 compact_index_1: |-
   client.index('INDEX_UID').compact
 get_index_stats_1: |-
-  client.index('movies').stats
+  client.index('movies').stats(show_internal_database_sizes: true, size_format: 'human')
 get_indexes_stats_1: |-
-  client.stats
+  client.stats(show_internal_database_sizes: true, size_format: 'human')
 get_health_1: |-
   client.health
 get_version_1: |-
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index afe832e1..b087be3c 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -14,7 +14,7 @@ Metrics/AbcSize:
 # Offense count: 4
 # Configuration parameters: CountComments, CountAsOne.
 Metrics/ClassLength:
-  Max: 541
+  Max: 542
 
 # Offense count: 4
 # Configuration parameters: CountComments, CountAsOne, AllowedMethods, AllowedPatterns.
diff --git a/lib/meilisearch/client.rb b/lib/meilisearch/client.rb
index 72da699b..95fd1e5e 100644
--- a/lib/meilisearch/client.rb
+++ b/lib/meilisearch/client.rb
@@ -305,11 +305,20 @@ def version
 
     # Get stats of all indexes in instance.
     #
+    # @param show_internal_database_sizes [Boolean] When +true+, each index stat object includes an
+    #   +internalDatabaseSizes+ map. The keys in this map are subject to change.
+    # @param size_format [String, nil] Controls how size fields are returned.
+    #   Use <tt>'human'</tt> for human-readable strings (e.g. <tt>"2.3 MiB"</tt>),
+    #   or <tt>'raw'</tt> (default) for numeric byte counts.
     # @see Index#stats
     # @see https://www.meilisearch.com/docs/reference/api/stats#get-stats-of-all-indexes Meilisearch API reference
     # @return [Hash{String => Object}] see {stats object}[https://www.meilisearch.com/docs/reference/api/stats#stats-object]
-    def stats
-      http_get '/stats'
+    def stats(show_internal_database_sizes: nil, size_format: nil)
+      params = {
+        showInternalDatabaseSizes: show_internal_database_sizes,
+        sizeFormat: size_format
+      }.compact
+      http_get '/stats', params
     end
 
     ### DUMPS
diff --git a/lib/meilisearch/index.rb b/lib/meilisearch/index.rb
index 1cfe0b9c..9cc2918c 100644
--- a/lib/meilisearch/index.rb
+++ b/lib/meilisearch/index.rb
@@ -675,10 +675,17 @@ def wait_for_task(task_uid, timeout_in_ms = 5000, interval_in_ms = 50)
 
     # Get stats of this index.
     #
+    # @param show_internal_database_sizes [Boolean] When +true+, the response includes an
+    #   +internalDatabaseSizes+ map of internal database names to their sizes.
+    #   The keys in this map are subject to change.
+    # @param size_format [String, nil] Controls how size fields are returned.
+    #   Use <tt>'human'</tt> for human-readable strings (e.g. <tt>"2.3 MiB"</tt>),
+    #   or <tt>'raw'</tt> (default) for numeric byte counts.
     # @return [Hash{String => Object}]
     # @see https://www.meilisearch.com/docs/reference/api/stats#get-stats-of-an-index  Meilisearch API Reference
-    def stats
-      http_get "/indexes/#{@uid}/stats"
+    def stats(show_internal_database_sizes: nil, size_format: nil)
+      params = { showInternalDatabaseSizes: show_internal_database_sizes, sizeFormat: size_format }
+      http_get "/indexes/#{@uid}/stats", params.compact
     end
 
     # Get the number of documents in the index.
diff --git a/spec/meilisearch/client/stats_spec.rb b/spec/meilisearch/client/stats_spec.rb
index 0df55b6f..ba10499d 100644
--- a/spec/meilisearch/client/stats_spec.rb
+++ b/spec/meilisearch/client/stats_spec.rb
@@ -13,4 +13,20 @@
     response = client.stats
     expect(response).to have_key('databaseSize')
   end
+
+  it 'gets stats with human-readable size format' do
+    response = client.stats(size_format: 'human')
+    expect(response).to have_key('databaseSize')
+    expect(response['databaseSize']).to be_a(String)
+  end
+
+  it 'gets stats with internal database sizes' do
+    client.create_index('books').await
+    response = client.stats(show_internal_database_sizes: true)
+
+    expect(response).to have_key('indexes')
+    response['indexes'].each_value do |index_stats|
+      expect(index_stats).to have_key('internalDatabaseSizes')
+    end
+  end
 end
diff --git a/spec/meilisearch/index/stats_spec.rb b/spec/meilisearch/index/stats_spec.rb
index 3cd4fbe8..1360787e 100644
--- a/spec/meilisearch/index/stats_spec.rb
+++ b/spec/meilisearch/index/stats_spec.rb
@@ -9,6 +9,18 @@
     expect(response).not_to be_empty
   end
 
+  it 'returns stats with human-readable size format' do
+    response = index.stats(size_format: 'human')
+    expect(response).to have_key('rawDocumentDbSize')
+    expect(response['rawDocumentDbSize']).to be_a(String)
+  end
+
+  it 'returns stats with internal database sizes' do
+    response = index.stats(show_internal_database_sizes: true)
+    expect(response).to have_key('internalDatabaseSizes')
+    expect(response['internalDatabaseSizes']).to be_a(Hash)
+  end
+
   it 'gets the number of documents' do
     response = index.number_of_documents
     expect(response).to eq(documents.count)