diff --git a/meilisearch/models/index.py b/meilisearch/models/index.py
index 0b3872f9..627c9335 100644
--- a/meilisearch/models/index.py
+++ b/meilisearch/models/index.py
@@ -37,6 +37,8 @@ class IndexStats(CamelBase):
     is_indexing: bool
     field_distribution: FieldDistribution
     internal_database_sizes: dict[str, Any] | None = None
+    index_size: int | None = None
+    used_index_size: int | None = None
 
     @field_validator("field_distribution", mode="before")
     @classmethod