From 09f2f38cb4d2009751840a3a74dfa8e9c0de352e Mon Sep 17 00:00:00 2001
From: Patrick Hoefler <61934744+phofl@users.noreply.github.com>
Date: Tue, 5 Sep 2023 20:07:21 +0200
Subject: [PATCH] Backport PR #55000: BUG: ArrowDtype raising for fixed size
 list

---
 doc/source/whatsnew/v2.1.1.rst       | 1 +
 pandas/core/dtypes/dtypes.py         | 2 ++
 pandas/tests/extension/test_arrow.py | 9 +++++++++
 3 files changed, 12 insertions(+)

diff --git a/doc/source/whatsnew/v2.1.1.rst b/doc/source/whatsnew/v2.1.1.rst
index a6848dad6e3cd..8a70f91b36825 100644
--- a/doc/source/whatsnew/v2.1.1.rst
+++ b/doc/source/whatsnew/v2.1.1.rst
@@ -28,6 +28,7 @@ Fixed regressions
 
 Bug fixes
 ~~~~~~~~~
+- Fixed bug for :class:`ArrowDtype` raising ``NotImplementedError`` for fixed-size list (:issue:`55000`)
 - Fixed bug in :meth:`DataFrame.stack` with ``future_stack=True`` and columns a non-:class:`MultiIndex` consisting of tuples (:issue:`54948`)
 
 .. ---------------------------------------------------------------------------
diff --git a/pandas/core/dtypes/dtypes.py b/pandas/core/dtypes/dtypes.py
index 53f0fb2843653..272e9928b96cb 100644
--- a/pandas/core/dtypes/dtypes.py
+++ b/pandas/core/dtypes/dtypes.py
@@ -2109,6 +2109,8 @@ def type(self):
             return CategoricalDtypeType
         elif pa.types.is_list(pa_type) or pa.types.is_large_list(pa_type):
             return list
+        elif pa.types.is_fixed_size_list(pa_type):
+            return list
         elif pa.types.is_map(pa_type):
             return list
         elif pa.types.is_struct(pa_type):
diff --git a/pandas/tests/extension/test_arrow.py b/pandas/tests/extension/test_arrow.py
index a2fee31d9f01b..ec2ca494b2aa1 100644
--- a/pandas/tests/extension/test_arrow.py
+++ b/pandas/tests/extension/test_arrow.py
@@ -3037,6 +3037,15 @@ def test_groupby_count_return_arrow_dtype(data_missing):
     tm.assert_frame_equal(result, expected)
 
 
+def test_fixed_size_list():
+    # GH#55000
+    ser = pd.Series(
+        [[1, 2], [3, 4]], dtype=ArrowDtype(pa.list_(pa.int64(), list_size=2))
+    )
+    result = ser.dtype.type
+    assert result == list
+
+
 def test_arrowextensiondtype_dataframe_repr():
     # GH 54062
     df = pd.DataFrame(