diff --git a/facebook.md b/facebook.md
deleted file mode 100644
index 30d51bbf0..000000000
--- a/facebook.md
+++ /dev/null
@@ -1,13 +0,0 @@
----
-title: Facebook
-layout: default
----
-
-### Share images (og:image)
-
- * Use 1200x630 (1.9:1)
- * anything less than 600x315 becomes square
-
-### References
-
- * https://developers.facebook.com/docs/plugins/checklist/
diff --git a/social-images.md b/social-images.md
new file mode 100644
index 000000000..3d19093cb
--- /dev/null
+++ b/social-images.md
@@ -0,0 +1,25 @@
+---
+title: Social media images
+---
+
+### Facebook
+
+| What | Dimensions |
+|:---- | ----------:|
+| Cover photo | 851 x 315 |
+| Display picture | 180 x 180 |
+| Highlighted image | 1200 x 717 (appears 843 x 504) |
+| Share image | 1200 x 900 (appears 851 x 315) | 
+| Share link (og:image) | 1200 x 627 (1.9:1) |
+
+### Twitter
+
+| What | Dimensions |
+|:---- | ----------:|
+| Page header | 1500 x 500 |
+| Display picture | 400 x 400 (shown as 200x200) |
+| In-stream photo preview | 440 x 220 (2:1) |
+
+### References
+
+ * https://developers.facebook.com/docs/plugins/checklist/