diff --git a/meta-arm-autonomy/documentation/n1sdp-image-customization.md b/meta-arm-autonomy/documentation/n1sdp-image-customization.md
index 9e4186c1..80c11cb3 100644
--- a/meta-arm-autonomy/documentation/n1sdp-image-customization.md
+++ b/meta-arm-autonomy/documentation/n1sdp-image-customization.md
@@ -11,12 +11,17 @@ perform a couple of customizations in the generated wic image:
    1 MiB per physical volume, hence it needs to be taken into account when
    setting GUEST_PART_SIZE.
 
-2. The wic image partition layout and contents with a custom wks file via
+2. Set the boot partition size (default: 100M) via `BOOT_PART_SIZE` and
+   `BOOT_PART_SIZE_UNIT` (M or G) variables in any conf file. The default
+   bootimg is ~44M so 100M leaves just over 50M of free space.
+
+3. The wic image partition layout and contents with a custom wks file via
    `ARM_AUTONOMY_WKS_FILE` variable (default:
    arm-autonomy-n1sdp-efidisk.wks.in which is affected by GUEST_PART_SIZE,
-   GUEST_PART_SIZE_UNIT and GRUB_CFG_FILE variables).
+   GUEST_PART_SIZE_UNIT, BOOT_PART_SIZE, BOOT_PART_SIZE_UNIT and
+   GRUB_CFG_FILE variables).
 
-3. Custom grub.cfg file via `GRUB_CFG_FILE` (default:
+4. Custom grub.cfg file via `GRUB_CFG_FILE` (default:
    arm-autonomy-n1sdp-grub.cfg) variable to be set in any conf file. The full
    path or relative to `ARM_AUTONOMY_WKS_FILE` should be set.
 
diff --git a/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/conf/machine/n1sdp-extra-settings.inc b/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/conf/machine/n1sdp-extra-settings.inc
index a6752391..977efc51 100644
--- a/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/conf/machine/n1sdp-extra-settings.inc
+++ b/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/conf/machine/n1sdp-extra-settings.inc
@@ -14,6 +14,10 @@ WKS_FILE = "${ARM_AUTONOMY_WKS_FILE}"
 GUEST_PART_SIZE ?= "4097"
 GUEST_PART_SIZE_UNIT ?= "M"
 
+# Set default boot partition size and unit
+BOOT_PART_SIZE ?= "100"
+BOOT_PART_SIZE_UNIT ?= "M"
+
 # The GRUB_CFG_FILE affects arm-autonomy-n1sdp-efidisk.wks.in file
 #
 # When alternate-kernel DISTRO_FEATURE is present we set the
diff --git a/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/wic/arm-autonomy-n1sdp-efidisk.wks.in b/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/wic/arm-autonomy-n1sdp-efidisk.wks.in
index d91d568d..ded628c6 100644
--- a/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/wic/arm-autonomy-n1sdp-efidisk.wks.in
+++ b/meta-arm-autonomy/dynamic-layers/meta-arm-bsp/wic/arm-autonomy-n1sdp-efidisk.wks.in
@@ -3,7 +3,7 @@
 # can directly dd to boot media. Uses a custom grub.cfg file to configure the boot.
 
 # First boot partition normally populated as /dev/sda1
-part /boot --source bootimg-efi --sourceparams="loader=grub-efi" --ondisk sda --label msdos --active --align 1024
+part /boot --source bootimg-efi --sourceparams="loader=grub-efi" --ondisk sda --size="${BOOT_PART_SIZE}${BOOT_PART_SIZE_UNIT}" --label msdos --active --align 1024
 
 # Second rootfs partition normally populated as /dev/sda2
 part / --source rootfs --ondisk sda --fstype=ext4 --label root --align 1024