diff --git a/cherryusb_config_template.h b/cherryusb_config_template.h
index 27f25199..c469a6a2 100644
--- a/cherryusb_config_template.h
+++ b/cherryusb_config_template.h
@@ -214,7 +214,11 @@
 //#define CONFIG_USBDEV_FSDEV_PMA_ACCESS 2 // maybe 1 or 2, many chips may have a difference
 
 /* ---------------- DWC2 Configuration ---------------- */
+/* (5 * number of control endpoints + 8) + ((largest USB packet used / 4) + 1 for
+ * status information) + (2 * number of OUT endpoints) + 1 for Global NAK
+ */
 // #define CONFIG_USB_DWC2_RXALL_FIFO_SIZE (1024 / 4)
+/* IN Endpoints Max packet Size / 4 */
 // #define CONFIG_USB_DWC2_TX0_FIFO_SIZE (64 / 4)
 // #define CONFIG_USB_DWC2_TX1_FIFO_SIZE (512 / 4)
 // #define CONFIG_USB_DWC2_TX2_FIFO_SIZE (64 / 4)