diff --git a/SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.m b/SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.m
index aaa3e7189..fbeb56a97 100644
--- a/SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.m
+++ b/SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.m
@@ -13,8 +13,8 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
-const NSUInteger kThumbnailDimensionPointsSmall = 300;
-const NSUInteger kThumbnailDimensionPointsMedium = 800;
+const NSUInteger kThumbnailDimensionPointsSmall = 200;
+const NSUInteger kThumbnailDimensionPointsMedium = 450;
 
 typedef void (^OWSLoadedThumbnailSuccess)(OWSLoadedThumbnail *loadedThumbnail);