diff --git a/FreeSimpleGUI/__init__.py b/FreeSimpleGUI/__init__.py
index 5925f37c..b2996487 100644
--- a/FreeSimpleGUI/__init__.py
+++ b/FreeSimpleGUI/__init__.py
@@ -9690,7 +9690,7 @@ def popup(
                 [
                     PopupButton(
                         custom_text,
-                        size=(len(custom_text), 1),
+                        size=(len(custom_text)+1, 1),
                         button_color=button_color,
                         focus=True,
                         bind_return_key=True,
@@ -9702,7 +9702,7 @@ def popup(
                 [
                     PopupButton(
                         custom_text[0],
-                        size=(len(custom_text[0]), 1),
+                        size=(len(custom_text[0])+1, 1),
                         button_color=button_color,
                         focus=True,
                         bind_return_key=True,
@@ -9717,9 +9717,9 @@ def popup(
                         button_color=button_color,
                         focus=True,
                         bind_return_key=True,
-                        size=(len(custom_text[0]), 1),
+                        size=(len(custom_text[0])+1, 1),
                     ),
-                    PopupButton(custom_text[1], button_color=button_color, size=(len(custom_text[1]), 1)),
+                    PopupButton(custom_text[1], button_color=button_color, size=(len(custom_text[1])+1, 1)),
                 ]
             ]
     elif button_type == POPUP_BUTTONS_YES_NO: