diff --git a/image.php b/image.php
index 6b2dbd86..9f0da9c7 100644
--- a/image.php
+++ b/image.php
@@ -70,8 +70,8 @@ get_header();
 								?>
 
 								<a href="<?php echo $next_attachment_url; ?>" title="<?php echo esc_attr( get_the_title() ); ?>" rel="attachment"><?php
-								$attachment_size = apply_filters( '_s_attachment_size', 1200 );
-								echo wp_get_attachment_image( $post->ID, array( $attachment_size, $attachment_size ) ); // filterable image width with, essentially, no limit for image height.
+									$attachment_size = apply_filters( '_s_attachment_size', array( 1200, 1200 ) ); // Filterable image size.
+									echo wp_get_attachment_image( $post->ID, $attachment_size );
 								?></a>
 							</div><!-- .attachment -->