diff --git a/win2xcur/align.py b/win2xcur/align.py
new file mode 100644
index 0000000..e776ec7
--- /dev/null
+++ b/win2xcur/align.py
@@ -0,0 +1,19 @@
+from typing import List
+import bisect
+
+from wand.color import Color
+
+from win2xcur.cursor import CursorFrame
+
+def apply_to_frames(frames: List[CursorFrame]) -> None:
+    sizes = [32, 48, 64, 96, 128, 256]
+    
+    for frame in frames:
+        for cursor in frame:
+            size_index = bisect.bisect_left(sizes, cursor.image.width)
+
+            if size_index < len(sizes):
+                next_size = sizes[size_index]
+                cursor.image.background_color = Color("transparent")
+                cursor.image.extent(width=next_size, height=next_size)
+
diff --git a/win2xcur/main/x2wincur.py b/win2xcur/main/x2wincur.py
index fabc142..f3cfc6d 100644
--- a/win2xcur/main/x2wincur.py
+++ b/win2xcur/main/x2wincur.py
@@ -8,6 +8,7 @@
 from typing import BinaryIO
 
 from win2xcur import scale
+from win2xcur import align
 from win2xcur.parser import open_blob
 from win2xcur.writer import to_smart
 
@@ -20,6 +21,8 @@ def main() -> None:
                         help='Directory to store converted cursor files.')
     parser.add_argument('-S', '--scale', default=None, type=float,
                         help='Scale the cursor by the specified factor.')
+    parser.add_argument('--align-sizes', action='store_true',
+                        help='Align image sizes to Windows default cursor sizes.')
 
     args = parser.parse_args()
     print_lock = Lock()
@@ -36,6 +39,8 @@ def process(file: BinaryIO) -> None:
         else:
             if args.scale:
                 scale.apply_to_frames(cursor.frames, scale=args.scale)
+            if args.align_sizes:
+                align.apply_to_frames(cursor.frames)
             ext, result = to_smart(cursor.frames)
             output = os.path.join(args.output, os.path.basename(name) + ext)
             with open(output, 'wb') as f:
diff --git a/win2xcur/main/x2wincurtheme.py b/win2xcur/main/x2wincurtheme.py
index 892da4b..6689f06 100644
--- a/win2xcur/main/x2wincurtheme.py
+++ b/win2xcur/main/x2wincurtheme.py
@@ -5,7 +5,7 @@
 from multiprocessing.pool import ThreadPool
 from pathlib import Path
 
-from win2xcur import scale
+from win2xcur import align, scale
 from win2xcur.parser.xtheme import parse_xcursor_theme
 from win2xcur.theme import ALL_CURSORS
 from win2xcur.writer.inf import export_windows_theme
@@ -19,6 +19,8 @@ def main() -> None:
                         help='Directory to store converted cursor files and install.inf.')
     parser.add_argument('-S', '--scale', default=None, type=float,
                         help='Scale the cursor by the specified factor.')
+    parser.add_argument('--align-sizes', action='store_true',
+                        help='Align image sizes to Windows default cursor sizes.')
 
     args = parser.parse_args()
 
@@ -32,8 +34,14 @@ def main() -> None:
 
     def process(name: str) -> None:
         cursor = getattr(theme, name)
-        if args.scale and cursor:
+
+        if not cursor: 
+            return
+        
+        if args.scale:
             scale.apply_to_frames(cursor.frames, scale=args.scale)
+        if args.align_sizes:
+            align.apply_to_frames(cursor.frames)
 
     with ThreadPool(cpu_count()) as pool:
         pool.map(process, ALL_CURSORS)