diff --git a/lvgl_helpers.h b/lvgl_helpers.h
index 9c622f7..7e61c30 100644
--- a/lvgl_helpers.h
+++ b/lvgl_helpers.h
@@ -21,6 +21,21 @@ extern "C" {
 /*********************
  *      DEFINES
  *********************/
+
+/* DISP_BUF_SIZE value doesn't have an special meaning, but it's the size
+ * of the buffer(s) passed to LVGL as display buffers. The default values used
+ * were the values working for the contributor of the display controller.
+ *
+ * As LVGL supports partial display updates the DISP_BUF_SIZE doesn't
+ * necessarily need to be equal to the display size.
+ *
+ * When using RGB displays the display buffer size will also depends on the
+ * color format being used, for RGB565 each pixel needs 2 bytes.
+ * When using the mono theme, the display pixels can be represented in one bit,
+ * so the buffer size can be divided by 8, e.g. see SSD1306 display size. */
+#if defined (CONFIG_CUSTOM_DISPLAY_BUFFER_SIZE)
+#define DISP_BUF_SIZE   CONFIG_CUSTOM_DISPLAY_BUFFER_BYTES
+#else
 #if defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7789)
 #define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ST7735S
@@ -38,7 +53,7 @@ extern "C" {
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9488
 #define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 64)
+#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 40)
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SSD1306
 #define DISP_BUF_SIZE  (LV_HOR_RES_MAX * (LV_VER_RES_MAX / 8))
 #elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
@@ -57,6 +72,7 @@ extern "C" {
 #else
 #error "No display controller selected"
 #endif
+#endif
 
 /**********************
  *      TYPEDEFS
diff --git a/lvgl_tft/Kconfig b/lvgl_tft/Kconfig
index 2b407bb..f37adb9 100644
--- a/lvgl_tft/Kconfig
+++ b/lvgl_tft/Kconfig
@@ -328,6 +328,18 @@ menu "LVGL TFT Display controller"
             select LV_TFT_DISPLAY_PROTOCOL_SPI
     endchoice
 
+    config CUSTOM_DISPLAY_BUFFER_SIZE
+        bool "Use custom display buffer size (bytes)"
+        help
+            Enable to use a custom display buffer size.
+
+    config CUSTOM_DISPLAY_BUFFER_BYTES
+        int "Custom buffer size (bytes)"
+        depends on CUSTOM_DISPLAY_BUFFER_SIZE
+        default 1024
+        help
+            See Display buffer on LVGL docs for more information.
+
     # Select one of the available FT81x configurations.
     choice
         prompt "Select a FT81x configuration." if LV_TFT_DISPLAY_USER_CONTROLLER_FT81X