diff --git a/README.md b/README.md
index 205c567..e45912b 100644
--- a/README.md
+++ b/README.md
@@ -14,3 +14,7 @@ To generate ESC/POS commands for the receipt printer use `print_tape.py`:
 ```
 uv run python print_tape.py -o ticker_tape.escpos trades_sorted.csv
 ```
+
+Defaults to 10,000 trades per escpos file, cutting the receipt paper every 1000 stocks.
+
+1000 trades translates into about roughly 10 feet of receipt paper.