diff --git a/src/functions.php b/src/functions.php
index 860c6cb..304e3f5 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -79,9 +79,6 @@ if ( ! function_exists( 'tainacan_setup' ) ) {
 							</div>'
 			));
 		}
-
-		add_image_size( 'tainacan-interface-list-post', 300, 200, true );
-		add_image_size( 'tainacan-interface-item-attachments', 125, 125, true );
 		
 		/**
 		 * Gutenberg support
diff --git a/src/template-parts/list-post.php b/src/template-parts/list-post.php
index 99118c5..f66172a 100644
--- a/src/template-parts/list-post.php
+++ b/src/template-parts/list-post.php
@@ -10,7 +10,7 @@
 	<?php if ( has_post_thumbnail() ) : ?>
 		<div class="col-xs-12 col-md-4 blog-thumbnail align-self-center text-center mb-4 mb-md-0">
 			<a href="<?php the_permalink(); ?>">
-				<?php the_post_thumbnail('tainacan-interface-list-post', array('class' => 'img-fluid')); ?>
+				<?php the_post_thumbnail('medium_large', array('class' => 'img-fluid')); ?>
 			</a>
 		</div>
 	<?php endif; ?>
diff --git a/src/template-parts/single-items-attachments_old.php b/src/template-parts/single-items-attachments_old.php
index 89746d3..b99e6e4 100644
--- a/src/template-parts/single-items-attachments_old.php
+++ b/src/template-parts/single-items-attachments_old.php
@@ -73,9 +73,9 @@
                         <?php endif; ?>
                         <?php foreach ( $attachments as $attachment ) { ?>
                             <div class="single-item-collection--attachments-file">
-                                <div class="<?php if (!wp_get_attachment_image( $attachment->ID, 'tainacan-interface-item-attachments')) echo'attachment-without-image'; ?>">
+                                <div class="<?php if (!wp_get_attachment_image( $attachment->ID, 'tainacan-medium')) echo'attachment-without-image'; ?>">
                                     <?php
-                                        echo wp_get_attachment_image( $attachment->ID, 'tainacan-interface-item-attachments', true );
+                                        echo wp_get_attachment_image( $attachment->ID, 'tainacan-medium', true );
                                         echo '<br>';
                                     ?>
                                     <span class="single-item-file-name <?php if (get_theme_mod('tainacan_single_item_hide_files_name', false)) echo 'sr-only' ?>"><?php echo get_the_title( $attachment->ID ); ?></span>
@@ -96,12 +96,12 @@
                         ?>
                         <div class="single-item-collection--attachments-file">
                             <a 
-                                class="<?php if (!wp_get_attachment_image( $attachment->ID, 'tainacan-interface-item-attachments')) echo'attachment-without-image'; ?>"
+                                class="<?php if (!wp_get_attachment_image( $attachment->ID, 'tainacan-medium')) echo'attachment-without-image'; ?>"
                                 href="<?php echo $href; ?>"
                                 data-toggle="lightbox"
                                 data-gallery="example-gallery">
                                 <?php
-                                    echo wp_get_attachment_image( $attachment->ID, 'tainacan-interface-item-attachments', true );
+                                    echo wp_get_attachment_image( $attachment->ID, 'tainacan-medium', true );
                                     echo '<br>';
                                 ?>
                                 <span class="single-item-file-name <?php if (get_theme_mod('tainacan_single_item_hide_files_name', false)) echo 'sr-only' ?>"><?php echo get_the_title( $attachment->ID ); ?></span>