diff --git a/efficiency_nodes.py b/efficiency_nodes.py
index bfca9fe..ea1b5f5 100644
--- a/efficiency_nodes.py
+++ b/efficiency_nodes.py
@@ -3871,7 +3871,10 @@ class TSC_ImageOverlay:
             overlay_image_size = overlay_image.size()
             overlay_image_size = (overlay_image_size[2], overlay_image_size[1])
             if overlay_resize == "Fit":
-                overlay_image_size = (base_image.size[0],base_image.size[1])
+                h_ratio = base_image.size()[1] / overlay_image_size[1]
+                w_ratio = base_image.size()[2] / overlay_image_size[0]
+                ratio = min(h_ratio, w_ratio)
+                overlay_image_size = tuple(round(dimension * ratio) for dimension in overlay_image_size)
             elif overlay_resize == "Resize by rescale_factor":
                 overlay_image_size = tuple(int(dimension * rescale_factor) for dimension in overlay_image_size)
             elif overlay_resize == "Resize to width & heigth":