diff --git a/Tests/test_imagepalette.py b/Tests/test_imagepalette.py
index ac99ef381..baa698bb4 100644
--- a/Tests/test_imagepalette.py
+++ b/Tests/test_imagepalette.py
@@ -9,10 +9,6 @@ def test_sanity():
     palette = ImagePalette.ImagePalette("RGB", list(range(256)) * 3)
     assert len(palette.colors) == 256
 
-    with pytest.warns(DeprecationWarning):
-        with pytest.raises(ValueError):
-            ImagePalette.ImagePalette("RGB", list(range(256)) * 3, 10)
-
 
 def test_reload():
     with Image.open("Tests/images/hopper.gif") as im:
diff --git a/docs/deprecations.rst b/docs/deprecations.rst
index f70a91834..e740238b6 100644
--- a/docs/deprecations.rst
+++ b/docs/deprecations.rst
@@ -12,17 +12,6 @@ Deprecated features
 Below are features which are considered deprecated. Where appropriate,
 a ``DeprecationWarning`` is issued.
 
-ImagePalette size parameter
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-.. deprecated:: 8.4.0
-
-The ``size`` parameter will be removed in Pillow 10.0.0 (2023-07-01).
-
-Before Pillow 8.3.0, ``ImagePalette`` required palette data of particular lengths by
-default, and the size parameter could be used to override that. Pillow 8.3.0 removed
-the default required length, also removing the need for the size parameter.
-
 ImageShow.Viewer.show_file file argument
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -209,6 +198,16 @@ JpegImagePlugin.convert_dict_qtables
 Since deprecation in Pillow 8.3.0, the ``convert_dict_qtables`` method no longer
 performed any operations on the data given to it, and has been removed.
 
+ImagePalette size parameter
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. deprecated:: 8.4.0
+.. versionremoved:: 10.0.0
+
+Before Pillow 8.3.0, ``ImagePalette`` required palette data of particular lengths by
+default, and the ``size`` parameter could be used to override that. Pillow 8.3.0
+removed the default required length, also removing the need for the ``size`` parameter.
+
 PyQt5 and PySide2
 ~~~~~~~~~~~~~~~~~
 
diff --git a/src/PIL/ImagePalette.py b/src/PIL/ImagePalette.py
index e455c0459..f0c094708 100644
--- a/src/PIL/ImagePalette.py
+++ b/src/PIL/ImagePalette.py
@@ -19,7 +19,6 @@
 import array
 
 from . import GimpGradientFile, GimpPaletteFile, ImageColor, PaletteFile
-from ._deprecate import deprecate
 
 
 class ImagePalette:
@@ -34,16 +33,11 @@ class ImagePalette:
         Defaults to an empty palette.
     """
 
-    def __init__(self, mode="RGB", palette=None, size=0):
+    def __init__(self, mode="RGB", palette=None):
         self.mode = mode
         self.rawmode = None  # if set, palette contains raw data
         self.palette = palette or bytearray()
         self.dirty = None
-        if size != 0:
-            deprecate("The size parameter", 10, None)
-            if size != len(self.palette):
-                msg = "wrong palette size"
-                raise ValueError(msg)
 
     @property
     def palette(self):