diff --git a/src/wp-includes/media.php b/src/wp-includes/media.php
index 3c675dd05d957..d5ed29d67ec43 100644
--- a/src/wp-includes/media.php
+++ b/src/wp-includes/media.php
@@ -1818,7 +1818,7 @@ function wp_image_src_get_dimensions( $image_src, $image_meta, $attachment_id =
 
 	// Is it a full size image?
 	if (
-		isset( $image_meta['file'] ) &&
+		isset( $image_meta['file'], $image_meta['width'], $image_meta['height'] ) &&
 		str_contains( $image_src, wp_basename( $image_meta['file'] ) )
 	) {
 		$dimensions = array(
diff --git a/tests/phpunit/tests/media/wpImageSrcGetDimensions.php b/tests/phpunit/tests/media/wpImageSrcGetDimensions.php
new file mode 100644
index 0000000000000..f3e107a149e34
--- /dev/null
+++ b/tests/phpunit/tests/media/wpImageSrcGetDimensions.php
@@ -0,0 +1,95 @@
+<?php
+
+/**
+ * Tests for the `wp_image_src_get_dimensions()` function.
+ *
+ * @group media
+ * @covers ::wp_image_src_get_dimensions
+ */
+class Tests_Media_wpImageSrcGetDimensions extends WP_UnitTestCase {
+
+	protected static $attachment_id;
+
+	public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
+		self::$attachment_id = $factory->attachment->create_object(
+			array(
+				'file'           => '2024/10/image.svg',
+				'post_mime_type' => 'image/svg+xml',
+			)
+		);
+	}
+
+	/**
+	 * Tests that `wp_image_src_get_dimensions()` returns the full size dimensions from the image meta.
+	 *
+	 * @ticket 62312
+	 */
+	public function test_should_return_full_size_dimensions() {
+		wp_update_attachment_metadata(
+			self::$attachment_id,
+			array(
+				'file'   => '2024/10/image.svg',
+				'width'  => 640,
+				'height' => 480,
+			)
+		);
+
+		$this->assertSame(
+			array( 640, 480 ),
+			wp_image_src_get_dimensions(
+				'http://example.org/wp-content/uploads/2024/10/image.svg',
+				wp_get_attachment_metadata( self::$attachment_id ),
+				self::$attachment_id
+			)
+		);
+	}
+
+	/**
+	 * Tests that `wp_image_src_get_dimensions()` returns false without raising warnings
+	 * when the full size image meta is missing width or height.
+	 *
+	 * @ticket 62312
+	 *
+	 * @dataProvider data_should_return_false_when_full_size_dimensions_are_missing
+	 *
+	 * @param array $image_meta The image meta data.
+	 */
+	public function test_should_return_false_when_full_size_dimensions_are_missing( $image_meta ) {
+		wp_update_attachment_metadata( self::$attachment_id, $image_meta );
+
+		$this->assertFalse(
+			wp_image_src_get_dimensions(
+				'http://example.org/wp-content/uploads/2024/10/image.svg',
+				wp_get_attachment_metadata( self::$attachment_id ),
+				self::$attachment_id
+			)
+		);
+	}
+
+	/**
+	 * Data provider.
+	 *
+	 * @return array[]
+	 */
+	public function data_should_return_false_when_full_size_dimensions_are_missing() {
+		return array(
+			'width and height missing' => array(
+				'image_meta' => array(
+					'file' => '2024/10/image.svg',
+				),
+			),
+			'width missing'            => array(
+				'image_meta' => array(
+					'file'   => '2024/10/image.svg',
+					'height' => 480,
+				),
+			),
+			'height missing'           => array(
+				'image_meta' => array(
+					'file'  => '2024/10/image.svg',
+					'width' => 640,
+				),
+			),
+		);
+	}
+}