diff --git a/.~lock.test_masque.xlsx# b/.~lock.test_masque.xlsx#
index 540f683..58cf175 100644
--- a/.~lock.test_masque.xlsx#
+++ b/.~lock.test_masque.xlsx#
@@ -1 +1 @@
-,sanchezn,pc-sanchezn,07.10.2025 21:40,file:///home/sanchezn/.config/libreoffice/4;
\ No newline at end of file
+,sanchezn,pc-sanchezn,07.10.2025 21:58,file:///home/sanchezn/.config/libreoffice/4;
\ No newline at end of file
diff --git a/src/arguments.rs b/src/arguments.rs
index b9be083..34aac97 100644
--- a/src/arguments.rs
+++ b/src/arguments.rs
@@ -38,6 +38,23 @@ impl ToString for TrimSpaces {
     }
 }
 
+#[derive(Clone, Debug, ValueEnum)]
+pub enum NumberRows {
+    AsIs,
+    Sequential,
+    None,
+}
+
+impl ToString for NumberRows {
+    fn to_string(&self) -> String {
+        match self {
+            NumberRows::AsIs => "as-is".into(),
+            NumberRows::Sequential => "sequential".into(),
+            NumberRows::None => "none".into(),
+        }
+    }
+}
+
 
 #[derive(Parser, Debug)]
 pub struct Arguments {
@@ -63,6 +80,6 @@ pub struct Arguments {
     #[arg(short, long, default_value_t = TrimSpaces::None)]
     pub trim: TrimSpaces,
     /// number the rows
-    #[arg(short, long, default_value_t = false)]
-    pub number_rows: bool,
+    #[arg(short, long, default_value_t = NumberRows::None)]
+    pub number_rows: NumberRows,
 }
diff --git a/src/xlsxtocsv.rs b/src/xlsxtocsv.rs
index 5ecb723..97ed067 100644
--- a/src/xlsxtocsv.rs
+++ b/src/xlsxtocsv.rs
@@ -1,7 +1,7 @@
 use std::path::Path;
 use umya_spreadsheet::{Range, Worksheet, reader};
 
-use crate::arguments::{Arguments, TrimSpaces};
+use crate::arguments::{Arguments, NumberRows, TrimSpaces};
 use crate::error::Error;
 
 pub fn xlsxtocsv(args: &Arguments) -> Result<(), Error> {
@@ -65,7 +65,9 @@ pub fn xlsxtocsv(args: &Arguments) -> Result<(), Error> {
     // TODO get every hidden columns
 
     // for each row...
+    let mut seq_row_num = 0;
     for i in 1..=num_rows {
+
         // Avoid hidden rows if asked for
         if !args.include_hidden_rows {
             match sheet.get_row_dimension(&i) {
@@ -75,9 +77,8 @@ pub fn xlsxtocsv(args: &Arguments) -> Result<(), Error> {
                     }
                 }
                 None => {
-                    if args.number_rows {
-                        print!("{}{}", i, args.separator);
-                    }
+                    seq_row_num += 1;
+                    number_row(&args.number_rows, args.separator, seq_row_num, i);
                     println!("{}", empty_row);
                     continue;
                 }
@@ -85,9 +86,8 @@ pub fn xlsxtocsv(args: &Arguments) -> Result<(), Error> {
         }
 
         // number the row
-        if args.number_rows {
-            print!("{}{}", i, args.separator);
-        }
+        seq_row_num += 1;
+        number_row(&args.number_rows, args.separator, seq_row_num, i);
 
         // for each column in row...
         let mut first = true;
@@ -147,6 +147,14 @@ pub fn xlsxtocsv(args: &Arguments) -> Result<(), Error> {
     Ok(())
 }
 
+fn number_row(number_row: &NumberRows, separator: char, seqrownum: u32, i: u32) {
+    match number_row {
+        NumberRows::AsIs => print!("{}{}", i, separator),
+        NumberRows::Sequential => print!("{}{}", seqrownum, separator),
+        NumberRows::None => {},
+    }
+}
+
 struct MergedCells {
     merged_cells: Vec<Range>,
     fill_horizontal: bool,
diff --git a/test_masque.xlsx b/test_masque.xlsx
index ca413f2..cb2cb9e 100644
Binary files a/test_masque.xlsx and b/test_masque.xlsx differ