diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.h b/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.h
index 6a2d063d79a4c..f491a77698046 100644
--- a/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.h
+++ b/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.h
@@ -12,3 +12,6 @@
 
 // #define DEFAULT_UART_BUS_RX (&pin_PA11)
 // #define DEFAULT_UART_BUS_TX (&pin_PA10)
+
+// Flash chip is GD25Q32 connected over QSPI
+#define TOTAL_FLASH_SIZE (4 * 1024 * 1024)
diff --git a/ports/raspberrypi/boards/qtpy_rp2040/mpconfigboard.h b/ports/raspberrypi/boards/qtpy_rp2040/mpconfigboard.h
index 26abe8a835a99..3f47784572eb1 100644
--- a/ports/raspberrypi/boards/qtpy_rp2040/mpconfigboard.h
+++ b/ports/raspberrypi/boards/qtpy_rp2040/mpconfigboard.h
@@ -12,3 +12,6 @@
 
 // #define DEFAULT_UART_BUS_RX (&pin_PA11)
 // #define DEFAULT_UART_BUS_TX (&pin_PA10)
+
+// Flash chip is GD25Q32 connected over QSPI
+#define TOTAL_FLASH_SIZE (4 * 1024 * 1024)
diff --git a/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.h b/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.h
index 4b0a220287a59..a506fec49eb2f 100644
--- a/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.h
+++ b/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.h
@@ -13,3 +13,6 @@
 
 // #define DEFAULT_UART_BUS_RX (&pin_PA11)
 // #define DEFAULT_UART_BUS_TX (&pin_PA10)
+
+// Flash chip is W25Q16JVUXIQ connected over QSPI
+#define TOTAL_FLASH_SIZE (2 * 1024 * 1024)
diff --git a/ports/raspberrypi/supervisor/internal_flash.c b/ports/raspberrypi/supervisor/internal_flash.c
index d333830de985e..e8ee5cf1a617c 100644
--- a/ports/raspberrypi/supervisor/internal_flash.c
+++ b/ports/raspberrypi/supervisor/internal_flash.c
@@ -44,10 +44,7 @@
 #include "src/rp2_common/hardware_flash/include/hardware/flash.h"
 #include "src/common/pico_binary_info/include/pico/binary_info.h"
 
-#define RESERVED_FLASH 1 * 1024 * 1024
-
-// TODO: Parameterize flash size based on the configured flash.
-#define TOTAL_FLASH_SIZE 2 * 1024 * 1024
+#define RESERVED_FLASH (1 * 1024 * 1024)
 
 // TODO: Split the caching out of supervisor/shared/external_flash so we can use it.
 #define SECTOR_SIZE 4096