diff --git a/app/presenters/post_presenter.rb b/app/presenters/post_presenter.rb
index 020023e9d..c89487dd1 100644
--- a/app/presenters/post_presenter.rb
+++ b/app/presenters/post_presenter.rb
@@ -14,12 +14,15 @@ class PostPresenter < Presenter
     html =  %{<article class="post-preview" id="post_#{post.id}" data-id="#{post.id}" data-tags="#{h(post.tag_string)}" data-uploader="#{h(post.uploader_name)}" data-rating="#{post.rating}" data-width="#{post.image_width}" data-height="#{post.image_height}" data-flags="#{flags.join(' ')}" data-parent-id="#{post.parent_id}" data-has-children="#{post.has_children?}">}
     html << %{<a href="#{path}/#{post.id}">}
     
-    if post.image_width.to_i > post.image_height.to_i * 1.3 && post.image_width.to_i > Danbooru.config.small_image_width && !post.is_flash?
-      klass = "wide"
+    if post.is_image? && post.image_width > post.image_height && post.image_width.to_i > Danbooru.config.small_image_width
+      ratio = Danbooru.config.small_image_width.to_f / post.image_height.to_f
+      offset = ((ratio * post.image_width) - Danbooru.config.small_image_width).to_i / 2
+      margin = "-#{offset}px"
     else
-      klass = "tall"
+      margin = 0
     end
-    html << %{<img class="#{klass}" src="#{post.preview_file_url}" alt="#{h(post.tag_string)}">}
+    
+    html << %{<img style="margin-left: #{margin};" src="#{post.preview_file_url}" alt="#{h(post.tag_string)}">}
     html << %{</a>}
     html << %{</article>}
     html.html_safe