diff --git a/l10n/en-US/viewer.properties b/l10n/en-US/viewer.properties
index a20f72219..324e843ba 100644
--- a/l10n/en-US/viewer.properties
+++ b/l10n/en-US/viewer.properties
@@ -92,10 +92,12 @@ document_properties_page_count=Page Count:
 document_properties_page_size=Page Size:
 document_properties_page_size_unit_inches=in
 document_properties_page_size_unit_millimeters=mm
+document_properties_page_size_orientation_portrait=portrait
+document_properties_page_size_orientation_landscape=landscape
 # LOCALIZATION NOTE (document_properties_page_size_dimension_string):
-# "{{width}}", "{{height}}", and {{unit}} will be replaced by the size,
-# respectively their unit of measurement, of the (current) page.
-document_properties_page_size_dimension_string={{width}} × {{height}} {{unit}}
+# "{{width}}", "{{height}}", {{unit}}, and {{orientation}} will be replaced by
+# the size, respectively their unit of measurement and orientation, of the (current) page.
+document_properties_page_size_dimension_string={{width}} × {{height}} {{unit}} ({{orientation}})
 document_properties_close=Close
 
 print_progress_message=Preparing document for printing…
diff --git a/l10n/sv-SE/viewer.properties b/l10n/sv-SE/viewer.properties
index 59f4a99d3..b31720635 100644
--- a/l10n/sv-SE/viewer.properties
+++ b/l10n/sv-SE/viewer.properties
@@ -92,10 +92,12 @@ document_properties_page_count=Sidantal:
 document_properties_page_size=Sidstorlek:
 document_properties_page_size_unit_inches=tum
 document_properties_page_size_unit_millimeters=mm
+document_properties_page_size_orientation_portrait=stående
+document_properties_page_size_orientation_landscape=liggande
 # LOCALIZATION NOTE (document_properties_page_size_dimension_string):
-# "{{width}}", "{{height}}", and {{unit}} will be replaced by the size,
-# respectively their unit of measurement, of the (current) page.
-document_properties_page_size_dimension_string={{width}} × {{height}} {{unit}}
+# "{{width}}", "{{height}}", {{unit}}, and {{orientation}} will be replaced by
+# the size, respectively their unit of measurement and orientation, of the (current) page.
+document_properties_page_size_dimension_string={{width}} × {{height}} {{unit}} ({{orientation}})
 document_properties_close=Stäng
 
 print_progress_message=Förbereder sidor för utskrift…
diff --git a/web/pdf_document_properties.js b/web/pdf_document_properties.js
index f65a10656..9513014f3 100644
--- a/web/pdf_document_properties.js
+++ b/web/pdf_document_properties.js
@@ -14,7 +14,8 @@
  */
 
 import {
-  cloneObj, getPageSizeInches, getPDFFileNameFromURL, NullL10n
+  cloneObj, getPageSizeInches, getPDFFileNameFromURL, isPortraitOrientation,
+  NullL10n
 } from './ui_utils';
 import { createPromiseCapability } from 'pdfjs-lib';
 
@@ -266,6 +267,7 @@ class PDFDocumentProperties {
         height: pageSizeInches.width,
       };
     }
+    const isPortrait = isPortraitOrientation(pageSizeInches);
 
     const sizeInches = {
       width: Math.round(pageSizeInches.width * 100) / 100,
@@ -282,12 +284,16 @@ class PDFDocumentProperties {
       this.l10n.get('document_properties_page_size_unit_' +
                     (this._isNonMetricLocale ? 'inches' : 'millimeters'), null,
                     this._isNonMetricLocale ? 'in' : 'mm'),
-    ]).then(([{ width, height, }, unit]) => {
+      this.l10n.get('document_properties_page_size_orientation_' +
+                    (isPortrait ? 'portrait' : 'landscape'), null,
+                    isPortrait ? 'portrait' : 'landscape'),
+    ]).then(([{ width, height, }, unit, orientation]) => {
       return this.l10n.get('document_properties_page_size_dimension_string', {
           width: width.toLocaleString(),
           height: height.toLocaleString(),
           unit,
-        }, '{{width}} × {{height}} {{unit}}');
+          orientation,
+        }, '{{width}} × {{height}} {{unit}} ({{orientation}})');
     });
   }