diff --git a/include/indicators/block_progress_bar.hpp b/include/indicators/block_progress_bar.hpp
index 162c2f3..dabb901 100644
--- a/include/indicators/block_progress_bar.hpp
+++ b/include/indicators/block_progress_bar.hpp
@@ -167,7 +167,7 @@ private:
     std::stringstream os;
     os << get_value<details::ProgressBarOption::prefix_text>();
     const auto result = os.str();
-    const auto result_size = result.size();
+    const auto result_size = unicode::display_width(result);
     return {result, result_size};
   }
 
@@ -216,7 +216,7 @@ private:
     os << " " << get_value<details::ProgressBarOption::postfix_text>();
 
     const auto result = os.str();
-    const auto result_size = result.size();
+    const auto result_size = unicode::display_width(result);
     return {result, result_size};
   }
 
diff --git a/include/indicators/indeterminate_progress_bar.hpp b/include/indicators/indeterminate_progress_bar.hpp
index 253fa73..f2e1281 100644
--- a/include/indicators/indeterminate_progress_bar.hpp
+++ b/include/indicators/indeterminate_progress_bar.hpp
@@ -163,7 +163,7 @@ private:
     std::stringstream os;
     os << get_value<details::ProgressBarOption::prefix_text>();
     const auto result = os.str();
-    const auto result_size = result.size();
+    const auto result_size = unicode::display_width(result);
     return {result, result_size};
   }
 
@@ -172,7 +172,7 @@ private:
     os << " " << get_value<details::ProgressBarOption::postfix_text>();
 
     const auto result = os.str();
-    const auto result_size = result.size();
+    const auto result_size = unicode::display_width(result);
     return {result, result_size};
   }
 
diff --git a/include/indicators/progress_bar.hpp b/include/indicators/progress_bar.hpp
index f260ca9..5ca7938 100644
--- a/include/indicators/progress_bar.hpp
+++ b/include/indicators/progress_bar.hpp
@@ -219,7 +219,7 @@ private:
     std::stringstream os;
     os << get_value<details::ProgressBarOption::prefix_text>();
     const auto result = os.str();
-    const auto result_size = result.size();
+    const auto result_size = unicode::display_width(result);
     return {result, result_size};
   }
 
@@ -273,7 +273,7 @@ private:
     os << " " << get_value<details::ProgressBarOption::postfix_text>();
 
     const auto result = os.str();
-    const auto result_size = result.size();
+    const auto result_size = unicode::display_width(result);
     return {result, result_size};
   }