diff --git a/schema/definitions/0.8.0/schema/fmu_results.json b/schema/definitions/0.8.0/schema/fmu_results.json
index 9017d29c6..4fcea0b2d 100644
--- a/schema/definitions/0.8.0/schema/fmu_results.json
+++ b/schema/definitions/0.8.0/schema/fmu_results.json
@@ -7594,20 +7594,34 @@
           "type": "array"
         },
         "num_columns": {
+          "anyOf": [
+            {
+              "type": "integer"
+            },
+            {
+              "type": "null"
+            }
+          ],
           "examples": [
             1,
             9999
           ],
-          "title": "Num Columns",
-          "type": "integer"
+          "title": "Num Columns"
         },
         "num_rows": {
+          "anyOf": [
+            {
+              "type": "integer"
+            },
+            {
+              "type": "null"
+            }
+          ],
           "examples": [
             1,
             9999
           ],
-          "title": "Num Rows",
-          "type": "integer"
+          "title": "Num Rows"
         },
         "size": {
           "examples": [
diff --git a/src/fmu/dataio/_model/specification.py b/src/fmu/dataio/_model/specification.py
index fcc8e8507..054c7e794 100644
--- a/src/fmu/dataio/_model/specification.py
+++ b/src/fmu/dataio/_model/specification.py
@@ -65,10 +65,10 @@ class TableSpecification(BaseModel):
     columns: List[str]
     """List of columns present in a table."""
 
-    num_columns: int = Field(examples=[1, 9999])
+    num_columns: Optional[int] = Field(examples=[1, 9999])
     """The number of columns in a table."""
 
-    num_rows: int = Field(examples=[1, 9999])
+    num_rows: Optional[int] = Field(examples=[1, 9999])
     """The number of rows in a table.."""
 
     size: int = Field(examples=[1, 9999])