diff --git a/DemoPrograms/Demo_PIL_Use.py b/DemoPrograms/Demo_PIL_Use.py
index 8f753e2f..e10b9700 100644
--- a/DemoPrograms/Demo_PIL_Use.py
+++ b/DemoPrograms/Demo_PIL_Use.py
@@ -15,6 +15,14 @@ import base64
     Copyright 2020 PySimpleGUI.org
 """
 
+def make_square(im, min_size=256, fill_color=(0, 0, 0, 0)):
+    x, y = im.size
+    size = max(min_size, x, y)
+    new_im = Image.new('RGBA', (size, size), fill_color)
+    new_im.paste(im, (int((size - x) / 2), int((size - y) / 2)))
+    return new_im
+
+
 def convert_to_bytes(file_or_bytes, resize=None, fill=False):
     '''
     Will convert into bytes and optionally resize an image that is a file or a base64 bytes object.
@@ -43,7 +51,8 @@ def convert_to_bytes(file_or_bytes, resize=None, fill=False):
         scale = min(new_height / cur_height, new_width / cur_width)
         img = img.resize((int(cur_width * scale), int(cur_height * scale)), PIL.Image.ANTIALIAS)
     if fill:
-        img = make_square(img, THUMBNAIL_SIZE[0])
+        if resize is not None:
+            img = make_square(img, resize[0])
     with io.BytesIO() as bio:
         img.save(bio, format="PNG")
         del img
@@ -61,7 +70,7 @@ def main():
 
     image = sg._random_error_icon()
     size = (60,60)
-    image = convert_to_bytes(image, size)
+    image = convert_to_bytes(image, size, fill=False)
 
     layout =    [[sg.Button('+', size=(4,2)), sg.Button('-', size=(4,2)), sg.B('Next', size=(4,2)), sg.T(size, size=(10,1), k='-SIZE-')],
                 [sg.Image(data=image, k='-IMAGE-')],
@@ -85,7 +94,7 @@ def main():
             image = event_window[event].ImageData
 
         # Resize image and update the window
-        image = convert_to_bytes(image, size)
+        image = convert_to_bytes(image, size, fill=True)
         window['-IMAGE-'].update(data=image)
         window['-BUTTON IMAGE-'].update(image_data=image)
         window['-SIZE-'].update(size)
@@ -93,4 +102,4 @@ def main():
 
 
 if __name__ == '__main__':
-    main()
+    main()
\ No newline at end of file