diff --git a/data/help.md b/data/help.md
index d1ce5997..86469481 100644
--- a/data/help.md
+++ b/data/help.md
@@ -40,6 +40,10 @@ Command                           | Description
 [search]datemax:...[/search]      | posted on `...` or earlier (format like in `date:`)       | `date_max`                                      |
 [search]filesizemin:7M[/search]   | has size of at least 7 megabytes                          | `filesize_min`                                  |
 [search]filesizemax:30K[/search]  | has size of at most 30 kilobytes                          | `filesize_max`                                  |
+[search]imgsize:huge[/search]     | either dimension has at least 2001px                      | `img_size`, `imagesize`, `image_size`           |
+[search]imgsize:large[/search]    | either dimension has at least 801px and at most 2000px    | `img_size`, `imagesize`, `image_size`           |
+[search]imgsize:medium[/search]   | either dimension has at least 301px and at most 800px     | `img_size`, `imagesize`, `image_size`           |
+[search]imgsize:small[/search]    | either dimension has at most 300px                        | `img_size`, `imagesize`, `image_size`           |
 [search]id:1,2,3[/search]         | having specific post ID                                   | `ids`                                           |
 [search]name:...[/search]         | having specific post name (hash in full URLs)             | `names`, `hash`, `hashes`                       |
 [search]idmin:5[/search]          | posts with ID greater than or equal to @5                 | `id_min`                                        |
diff --git a/src/Models/SearchParsers/PostSearchParser.php b/src/Models/SearchParsers/PostSearchParser.php
index 1f7efc74..866a5f62 100644
--- a/src/Models/SearchParsers/PostSearchParser.php
+++ b/src/Models/SearchParsers/PostSearchParser.php
@@ -174,6 +174,15 @@ class PostSearchParser extends AbstractSearchParser
 			return Sql\Functors::equalsOrLesser('post.file_size', new Sql\Binding($fileSizeMax));
 		}
 
+		elseif (in_array($key, ['imagesize', 'imgsize', 'image_size', 'img_size']))
+		{
+			list ($dimensionMin, $dimensionMax) = self::parseImageSize($value);
+			$select = 'MAX(post.image_width, post.image_height)';
+			return Sql\Functors::conjunction()
+				->add(Sql\Functors::equalsOrGreater(Sql\Statements::raw($select), $dimensionMin))
+				->add(Sql\Functors::equalsOrLesser(Sql\Statements::raw($select), $dimensionMax));
+		}
+
 		elseif ($key == 'special')
 		{
 			$activeUser = Auth::getCurrentUser();
@@ -302,6 +311,30 @@ class PostSearchParser extends AbstractSearchParser
 		return true;
 	}
 
+	protected static function parseImageSize($value)
+	{
+		$sizes =
+		[
+			'huge' => 2001,
+			'large' => 801,
+			'medium' => 301,
+			'small' => 1
+		];
+
+		$value = strtolower(trim($value));
+		if (isset($sizes[$value]))
+		{
+			$dimensionMin = $sizes[$value];
+			$keys = array_keys($sizes);
+			$i = array_search($value, $keys) - 1;
+			$dimensionMax = $i >= 0 ? $sizes[$keys[$i]] - 1 : PHP_INT_MAX;
+		}
+		else
+			throw new SimpleException('Invalid format exception');
+
+		return [$dimensionMin, $dimensionMax];
+	}
+
 	protected static function parseDate($value)
 	{
 		$value = strtolower(trim($value));