diff --git a/sentry_sdk/integrations/django/caching.py b/sentry_sdk/integrations/django/caching.py
index affbae3226..921f8e485d 100644
--- a/sentry_sdk/integrations/django/caching.py
+++ b/sentry_sdk/integrations/django/caching.py
@@ -51,7 +51,7 @@ def _instrument_call(cache, method_name, original_method, args, kwargs):
             if value:
                 span.set_data(SPANDATA.CACHE_HIT, True)
 
-                size = len(text_type(value).encode("utf-8"))
+                size = len(text_type(value))
                 span.set_data(SPANDATA.CACHE_ITEM_SIZE, size)
 
             else: