diff --git a/thumbgen/thumbgen.py b/thumbgen/thumbgen.py
index d03c3e8..1fc45bf 100644
--- a/thumbgen/thumbgen.py
+++ b/thumbgen/thumbgen.py
@@ -12,9 +12,12 @@
 gi.require_version("GnomeDesktop", "3.0")
 from gi.repository import Gio, GnomeDesktop  # isort:skip
 
-
-global factory
-factory = GnomeDesktop.DesktopThumbnailFactory()
+thumbnail_size_map = {
+    "normal": GnomeDesktop.DesktopThumbnailSize.NORMAL,
+    "large": GnomeDesktop.DesktopThumbnailSize.LARGE,
+    "x-large": GnomeDesktop.DesktopThumbnailSize.XLARGE,
+    "xx-large": GnomeDesktop.DesktopThumbnailSize.XXLARGE,
+}
 logger.remove()
 logger.add(sys.stdout, level="INFO")
 logger.add("/tmp/thumbgen.log", level="DEBUG", rotation="100 MB")
@@ -35,8 +38,12 @@ def make_thumbnail(fpath: str) -> bool:
     if not factory.can_thumbnail(uri, mime_type, mtime):
         logger.debug("UNSUPPORTED {}".format(uri))
         return False
-
-    thumbnail = factory.generate_thumbnail(uri, mime_type)
+    # Exception handling in case of corrupted images
+    try:
+        thumbnail = factory.generate_thumbnail(uri, mime_type)
+    except Exception as e:
+        logger.debug("ERROR       {}: {}".format(uri, e))
+        return False
     if thumbnail is None:
         logger.debug("ERROR       {}".format(uri))
         return False
@@ -78,15 +85,30 @@ def get_all_files(*, dir_path: Path, recursive: bool) -> List[Path]:
 @click.option(
     "-d", "--img_dirs", required=True, help='directories to generate thumbnails seperated by space, eg: "dir1/dir2 dir3"'
 )
+@click.option(
+    "-s", "--size", default="normal", type=click.Choice(["normal", "large", "x-large", "xx-large", "all"]), help="Thumbnail size: normal, large, x-large, xx-large, all"
+)
 @click.option("-w", "--workers", default=1, help="no of cpus to use for processing")
 @click.option(
     "-i", "--only_images", is_flag=True, default=False, help="Whether to only look for images to be thumbnailed"
 )
 @click.option("-r", "--recursive", is_flag=True, default=False, help="Whether to recursively look for files")
-def main(img_dirs: str, workers: str, only_images: bool, recursive: bool) -> None:
+def main(img_dirs: str, size: str, workers: str, only_images: bool, recursive: bool) -> None:
     img_dirs = [Path(img_dir) for img_dir in img_dirs.split()]
-    for img_dir in img_dirs:
-        thumbnail_folder(dir_path=img_dir, workers=workers, only_images=only_images, recursive=recursive)
+
+    thumbnail_sizes = []
+    if size == "all":
+        thumbnail_sizes = thumbnail_size_map.keys()
+    else:
+        thumbnail_sizes = [size]
+
+    global factory
+    for s in thumbnail_sizes:
+        factory = GnomeDesktop.DesktopThumbnailFactory.new(thumbnail_size_map[s])
+        print("Starting Thumbnail Generation for size: {}".format(s))
+        for img_dir in img_dirs:
+            thumbnail_folder(dir_path=img_dir, workers=workers, only_images=only_images, recursive=recursive)
+        print("Thumbnail Generation Completed for size: {}".format(s))
     print("Thumbnail Generation Completed!")