diff --git a/pmb/config/__init__.py b/pmb/config/__init__.py
index 3a21adc8..d5558613 100644
--- a/pmb/config/__init__.py
+++ b/pmb/config/__init__.py
@@ -53,7 +53,8 @@ config_keys = ["aports",
                "ui",
                "ui_extras",
                "user",
-               "work"]
+               "work",
+               "boot_size"]
 
 # Config file/commandline default values
 # $WORK gets replaced with the actual value for args.work (which may be
@@ -89,6 +90,7 @@ defaults = {
     "ui_extras": False,
     "user": "user",
     "work": os.path.expanduser("~") + "/.local/var/pmbootstrap",
+    "boot_size": "128",
 }
 
 #
diff --git a/pmb/config/init.py b/pmb/config/init.py
index c4622d1f..846232bf 100644
--- a/pmb/config/init.py
+++ b/pmb/config/init.py
@@ -336,13 +336,21 @@ def ask_for_device(args):
 
 def ask_for_additional_options(args, cfg):
     # Allow to skip additional options
-    logging.info("Additional options: Parallel jobs: " + args.jobs +
-                 ", ccache per arch: " + args.ccache_size)
+    logging.info("Additional options:"
+                 f" boot partition size: {args.boot_size} MB,"
+                 f" parallel jobs: {args.jobs},"
+                 f" ccache per arch: {args.ccache_size}")
 
     if not pmb.helpers.cli.confirm(args, "Change them?",
                                    default=False):
         return
 
+    # Boot size
+    logging.info("What should be the boot partition size (in MB)?")
+    answer = pmb.helpers.cli.ask(args, "Boot size", None, args.boot_size,
+                                 validation_regex="[1-9][0-9]*")
+    cfg["pmbootstrap"]["boot_size"] = answer
+
     # Parallel job count
     logging.info("How many jobs should run parallel on this machine, when"
                  " compiling?")
diff --git a/pmb/install/_install.py b/pmb/install/_install.py
index 565168f8..6a4d10f4 100644
--- a/pmb/install/_install.py
+++ b/pmb/install/_install.py
@@ -49,8 +49,7 @@ def get_subpartitions_size(args):
     # Add some free space, see also: #336, #1671
     root *= 1.20
     root += 50 * 1024 * 1024
-    boot *= 2
-    boot += 25 * 1024 * 1024
+    boot = int(args.boot_size) * 1024 * 1024
     return (boot, root)
 
 
diff --git a/pmb/parse/arguments.py b/pmb/parse/arguments.py
index c3d2bef5..212cdfde 100644
--- a/pmb/parse/arguments.py
+++ b/pmb/parse/arguments.py
@@ -356,6 +356,10 @@ def arguments():
                              pmb.config.defaults["mirror_alpine"],
                         metavar="URL")
     parser.add_argument("-j", "--jobs", help="parallel jobs when compiling")
+    parser.add_argument("-B", "--boot-size",
+                        help="specify an integer with your preferred boot"
+                             "partition size on target machine in MB (default"
+                             " 128)")
     parser.add_argument("-p", "--aports",
                         help="postmarketos aports (pmaports) path")
     parser.add_argument("-t", "--timeout", help="seconds after which processes"
diff --git a/test/test_questions.py b/test/test_questions.py
index a0998631..bc7e9696 100644
--- a/test/test_questions.py
+++ b/test/test_questions.py
@@ -260,9 +260,10 @@ def test_questions_additional_options(args, monkeypatch):
     assert cfg == {"pmbootstrap": {}}
 
     # Answer everything
-    fake_answers(monkeypatch, ["y", "5", "2G", "n"])
+    fake_answers(monkeypatch, ["y", "64", "5", "2G", "n"])
     func(args, cfg)
-    assert cfg == {"pmbootstrap": {"jobs": "5",
+    assert cfg == {"pmbootstrap": {"boot_size": "64",
+                                   "jobs": "5",
                                    "ccache_size": "2G"}}