diff --git a/layouts/shortcodes/img.html b/layouts/shortcodes/img.html
index 75330c86..dcd8f1d9 100644
--- a/layouts/shortcodes/img.html
+++ b/layouts/shortcodes/img.html
@@ -3,10 +3,10 @@
 
 {{/* set image sizes, these are hardcoded for now, x dictates that images are resized to this width */}}
 
-{{ $tinyw := default "500x" }}
-{{ $smallw := default "800x" }}
-{{ $mediumw := default "1200x" }}
-{{ $largew := default "1500x" }}
+{{ $tinyw := default "408x" }}
+{{ $smallw := default "816x" }}
+{{ $mediumw := default "1224x" }}
+{{ $largew := default "1632x" }}
 
 {{/* resize the src image to the given sizes */}}
 
@@ -28,17 +28,17 @@
 <img
   {{ with .Get "sizes" }}sizes='{{.}}'{{ else }}sizes="(min-width: 35em) 1200px, 100vw"{{ end }}
   srcset='
-  {{ if ge $src.Width "500" }}
-    {{ with $tiny.RelPermalink }}{{.}} 500w{{ end }}
+  {{ if ge $src.Width "408" }}
+    {{ with $tiny.RelPermalink }}{{.}} 408w{{ end }}
   {{ end }}
-  {{ if ge $src.Width "800" }}
-    {{ with $small.RelPermalink }}, {{.}} 800w{{ end }}
+  {{ if ge $src.Width "816" }}
+    {{ with $small.RelPermalink }}, {{.}} 816w{{ end }}
   {{ end }}
-  {{ if ge $src.Width "1200" }}
-    {{ with $medium.RelPermalink }}, {{.}} 1200w{{ end }}
+  {{ if ge $src.Width "1224" }}
+    {{ with $medium.RelPermalink }}, {{.}} 1224w{{ end }}
   {{ end }}
-  {{ if ge $src.Width "1500" }}
-    {{ with $large.RelPermalink }}, {{.}} 1500w {{ end }}
+  {{ if ge $src.Width "1632" }}
+    {{ with $large.RelPermalink }}, {{.}} 1632w {{ end }}
   {{ end }}'
   {{ if .Get $medium }}
     src="{{ $medium.RelPermalink }}"