diff --git a/sphinx/texinputs/sphinx.sty b/sphinx/texinputs/sphinx.sty
index cee4dc566..0d37e02c6 100644
--- a/sphinx/texinputs/sphinx.sty
+++ b/sphinx/texinputs/sphinx.sty
@@ -209,7 +209,7 @@
             {\py@TitleColor\thesubsection}{0.5em}{\py@TitleColor}{\py@NormalColor}
 \titleformat{\subsubsection}{\py@HeaderFamily}%
             {\py@TitleColor\thesubsubsection}{0.5em}{\py@TitleColor}{\py@NormalColor}
-\titleformat{\paragraph}{\large\py@HeaderFamily}%
+\titleformat{\paragraph}{\small\py@HeaderFamily}%
             {\py@TitleColor}{0em}{\py@TitleColor}{\py@NormalColor}
 
 % {fulllineitems} is the main environment for object descriptions.