diff --git a/include/arg_func.hpp b/include/arg_func.hpp
index c038c55..7283c18 100644
--- a/include/arg_func.hpp
+++ b/include/arg_func.hpp
@@ -21,6 +21,7 @@ enum class Arg
 	Username,		 // update username
 	Name,				 // update label name
 	File,				 // select save file
+	Size				 // show size of file
 };
 
 Arg get_args(int argc, char **argv, char **label);
@@ -45,4 +46,6 @@ void arg_show(Buffer &decrypted_buffer, const char *label);
 
 void arg_file(Buffer &decrypted_buffer, Buffer &encrypted_buffer, const char *label, Cryptography &crypto, std::string &save_location_path);
 
+void arg_size(Buffer &encrypted_buffer);
+
 #endif
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
index a0e4f10..82470ab 100644
--- a/main.cpp
+++ b/main.cpp
@@ -146,6 +146,10 @@ int main(int argc, char **argv)
 		arg_file(decrypted_buffer, encrypted_buffer, label, crypto, save_location_path.value());
 		break;
 
+	case Arg::Size:
+		arg_size(encrypted_buffer);
+		break;
+
 	default:
 		break;
 	}
diff --git a/source/arg_func.cpp b/source/arg_func.cpp
index b880919..3641b4a 100644
--- a/source/arg_func.cpp
+++ b/source/arg_func.cpp
@@ -30,6 +30,7 @@ void print_args()
 	printf(" -l                   list all labels\n");
 	printf(" -p                   print all passwords\n");
 	printf(" -c                   change master password\n");
+	printf(" -z                   print size of file\n");
 	printf(" -f <folder path>     select save folder\n");
 }
 
@@ -58,6 +59,8 @@ Arg get_args(int argc, char **argv, char **label)
 		return Arg::Print_all_p;
 	case 'c':
 		return Arg::Change;
+	case 'z':
+		return Arg::Size;
 	}
 
 	if (argc != 3)
@@ -347,4 +350,9 @@ void arg_file(Buffer &decrypted_buffer, Buffer &encrypted_buffer, const char *la
 
 	crypto.encrypt(&decrypted_buffer, &encrypted_buffer);
 	encrypted_buffer.save_to_file(save.string());
+}
+
+void arg_size(Buffer &encrypted_buffer)
+{
+	printf("File size is: %ldB\n", encrypted_buffer.taken);
 }
\ No newline at end of file