diff --git a/src/atextcrawler/search/engine.py b/src/atextcrawler/search/engine.py
index 7a72de6..f029a7b 100644
--- a/src/atextcrawler/search/engine.py
+++ b/src/atextcrawler/search/engine.py
@@ -53,6 +53,7 @@ properties = {
     'time_horizon': {'type': 'keyword'},
     'orig_source': {'type': 'text'},
     'topics': {'type': 'text'},
+    'length': {'type': 'integer'},
     'annotations': {'type': 'text', 'index': False},
     'sections': {
         'type': 'nested',
@@ -179,6 +180,7 @@ async def index_resource(
         'time_horizon': resource.search_fields.get('time_horizon'),
         'orig_source': resource.search_fields.get('orig_source'),
         'topics': resource.search_fields.get('topics'),
+        'length': len(text),
         'annotations': pack_annotations(annotations),
         'sections': sections,
     }