diff --git a/doc/changes/devel/12474.bugfix.rst b/doc/changes/devel/12474.bugfix.rst
new file mode 100644
index 00000000000..875d7574f7b
--- /dev/null
+++ b/doc/changes/devel/12474.bugfix.rst
@@ -0,0 +1 @@
+- Changed default ECoG and sEEG electrode sizes in brain plots to better reflect real world sizes, by `Liberty Hamilton`_
diff --git a/mne/defaults.py b/mne/defaults.py
index b9e6702edec..31fc53299e9 100644
--- a/mne/defaults.py
+++ b/mne/defaults.py
@@ -235,8 +235,8 @@
         eeg_scale=4e-3,
         eegp_scale=20e-3,
         eegp_height=0.1,
-        ecog_scale=5e-3,
-        seeg_scale=5e-3,
+        ecog_scale=2e-3,
+        seeg_scale=2e-3,
         meg_scale=1.0,  # sensors are already in SI units
         ref_meg_scale=1.0,
         dbs_scale=5e-3,