diff --git a/django/contrib/postgres/fields/array.py b/django/contrib/postgres/fields/array.py
index 28c0f6679e..88df368c73 100644
--- a/django/contrib/postgres/fields/array.py
+++ b/django/contrib/postgres/fields/array.py
@@ -134,12 +134,9 @@ class ArrayField(CheckFieldDefaultMixin, Field):
         name, path, args, kwargs = super().deconstruct()
         if path == "django.contrib.postgres.fields.array.ArrayField":
             path = "django.contrib.postgres.fields.ArrayField"
-        kwargs.update(
-            {
-                "base_field": self.base_field.clone(),
-                "size": self.size,
-            }
-        )
+        kwargs["base_field"] = self.base_field.clone()
+        if self.size is not None:
+            kwargs["size"] = self.size
         return name, path, args, kwargs
 
     def to_python(self, value):
diff --git a/tests/postgres_tests/array_default_migrations/0001_initial.py b/tests/postgres_tests/array_default_migrations/0001_initial.py
index 5c6fa7e189..7a8c993f65 100644
--- a/tests/postgres_tests/array_default_migrations/0001_initial.py
+++ b/tests/postgres_tests/array_default_migrations/0001_initial.py
@@ -20,9 +20,7 @@ class Migration(migrations.Migration):
                 ),
                 (
                     "field",
-                    django.contrib.postgres.fields.ArrayField(
-                        models.IntegerField(), size=None
-                    ),
+                    django.contrib.postgres.fields.ArrayField(models.IntegerField()),
                 ),
             ],
             options={},
diff --git a/tests/postgres_tests/array_default_migrations/0002_integerarraymodel_field_2.py b/tests/postgres_tests/array_default_migrations/0002_integerarraymodel_field_2.py
index ab1f06b5de..a32d62eea1 100644
--- a/tests/postgres_tests/array_default_migrations/0002_integerarraymodel_field_2.py
+++ b/tests/postgres_tests/array_default_migrations/0002_integerarraymodel_field_2.py
@@ -12,7 +12,7 @@ class Migration(migrations.Migration):
             model_name="integerarraydefaultmodel",
             name="field_2",
             field=django.contrib.postgres.fields.ArrayField(
-                models.IntegerField(), default=[], size=None
+                models.IntegerField(), default=[]
             ),
             preserve_default=False,
         ),
diff --git a/tests/postgres_tests/migrations/0002_create_test_models.py b/tests/postgres_tests/migrations/0002_create_test_models.py
index 31705ae21a..f9a102d3dc 100644
--- a/tests/postgres_tests/migrations/0002_create_test_models.py
+++ b/tests/postgres_tests/migrations/0002_create_test_models.py
@@ -32,7 +32,7 @@ class Migration(migrations.Migration):
                         primary_key=True,
                     ),
                 ),
-                ("field", ArrayField(models.CharField(max_length=10), size=None)),
+                ("field", ArrayField(models.CharField(max_length=10))),
             ],
             options={
                 "required_db_vendor": "postgresql",
@@ -51,9 +51,9 @@ class Migration(migrations.Migration):
                         primary_key=True,
                     ),
                 ),
-                ("datetimes", ArrayField(models.DateTimeField(), size=None)),
-                ("dates", ArrayField(models.DateField(), size=None)),
-                ("times", ArrayField(models.TimeField(), size=None)),
+                ("datetimes", ArrayField(models.DateTimeField())),
+                ("dates", ArrayField(models.DateField())),
+                ("times", ArrayField(models.TimeField())),
             ],
             options={
                 "required_db_vendor": "postgresql",
@@ -94,21 +94,20 @@ class Migration(migrations.Migration):
                 ),
                 (
                     "ips",
-                    ArrayField(models.GenericIPAddressField(), size=None, default=list),
+                    ArrayField(models.GenericIPAddressField(), default=list),
                 ),
-                ("uuids", ArrayField(models.UUIDField(), size=None, default=list)),
+                ("uuids", ArrayField(models.UUIDField(), default=list)),
                 (
                     "decimals",
                     ArrayField(
                         models.DecimalField(max_digits=5, decimal_places=2),
-                        size=None,
                         default=list,
                     ),
                 ),
-                ("tags", ArrayField(TagField(), blank=True, null=True, size=None)),
+                ("tags", ArrayField(TagField(), blank=True, null=True)),
                 (
                     "json",
-                    ArrayField(models.JSONField(default=dict), default=list, size=None),
+                    ArrayField(models.JSONField(default=dict), default=list),
                 ),
                 ("int_ranges", ArrayField(IntegerRangeField(), null=True, blank=True)),
                 (
@@ -135,9 +134,7 @@ class Migration(migrations.Migration):
                 ),
                 (
                     "field",
-                    ArrayField(
-                        models.IntegerField(), blank=True, default=list, size=None
-                    ),
+                    ArrayField(models.IntegerField(), blank=True, default=list),
                 ),
             ],
             options={
@@ -159,7 +156,7 @@ class Migration(migrations.Migration):
                 ),
                 (
                     "field",
-                    ArrayField(ArrayField(models.IntegerField(), size=None), size=None),
+                    ArrayField(ArrayField(models.IntegerField())),
                 ),
             ],
             options={
@@ -203,15 +200,11 @@ class Migration(migrations.Migration):
                 ),
                 (
                     "field",
-                    ArrayField(models.IntegerField(), size=None, null=True, blank=True),
+                    ArrayField(models.IntegerField(), null=True, blank=True),
                 ),
                 (
                     "field_nested",
-                    ArrayField(
-                        ArrayField(models.IntegerField(null=True), size=None),
-                        size=None,
-                        null=True,
-                    ),
+                    ArrayField(ArrayField(models.IntegerField(null=True)), null=True),
                 ),
                 ("order", models.IntegerField(null=True)),
             ],
@@ -524,7 +517,7 @@ class Migration(migrations.Migration):
                 ),
                 (
                     "array_of_enums",
-                    ArrayField(EnumField(max_length=20), size=None),
+                    ArrayField(EnumField(max_length=20)),
                 ),
             ],
             options={
diff --git a/tests/postgres_tests/test_array.py b/tests/postgres_tests/test_array.py
index 9ad4ec16e9..745ae6090a 100644
--- a/tests/postgres_tests/test_array.py
+++ b/tests/postgres_tests/test_array.py
@@ -923,6 +923,7 @@ class TestMigrations(TransactionTestCase):
     def test_deconstruct(self):
         field = ArrayField(models.IntegerField())
         name, path, args, kwargs = field.deconstruct()
+        self.assertEqual(kwargs.keys(), {"base_field"})
         new = ArrayField(*args, **kwargs)
         self.assertEqual(type(new.base_field), type(field.base_field))
         self.assertIsNot(new.base_field, field.base_field)