diff --git a/docs/requirements.txt b/docs/requirements.txt
index 889f938f0..45bdd9579 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,3 +3,4 @@ sphinx-copybutton
 jinja2<3.1.0
 sphinx-rtd-dark-mode
 sphinx-hoverxref
+sphinx-rtd-size
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 1f7069905..a76bd2006 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -45,7 +45,9 @@
     "sphinx_copybutton",
     "sphinx_rtd_dark_mode",
     "sphinx.ext.autosectionlabel",
+    "sphinx_rtd_size",
 ]
+sphinx_rtd_size_width = "75%"
 autosectionlabel_prefix_document = True
 
 default_dark_mode = False