Lots of stuff.

packages/Graphics.sty

@@ -5,14 +5,16 @@
 
 \dim_const:Nn \c_Graphics_icon_dim {0.25in}
 
+\dim_const:Nn \c_InlineGraphic_offset_dim {-2pt}
+
 \NewDocumentCommand{\IconSize}{}{\c_Graphics_icon_dim}
 
 \keys_define:nn{InlineGraphic}{
 	height	.dim_set:N	= \l_InlineGraphic_height_dim,
-	height	.initial:n	= {12pt},
+	height	.initial:e	= {\baselineskip},
 
 	offset	.dim_set:N	= \l_InlineGraphic_offset_dim,
-	offset	.initial:n	= {-2pt},
+	offset	.initial:e	= {\c_InlineGraphic_offset_dim},
 }
 
 \NewDocumentCommand{\InlineGraphic}{
@@ -23,9 +25,10 @@
 }{
 	\keys_set:nn{InlineGraphic}{#1}
 	\raisebox{\l_InlineGraphic_offset_dim}{
-		\includegraphics[
-			keepaspectratio,height=12pt
-		]{#2}
+		\expanded{\noexpand\includegraphics[
+			keepaspectratio,
+			height=\l_InlineGraphic_height_dim,
+		] {#2}}
 	}
 }