diff --git a/Manuals/FDS_Validation_Guide/Plume_Chapter.tex b/Manuals/FDS_Validation_Guide/Plume_Chapter.tex
index 18585407a4..b952bcf288 100644
--- a/Manuals/FDS_Validation_Guide/Plume_Chapter.tex
+++ b/Manuals/FDS_Validation_Guide/Plume_Chapter.tex
@@ -1184,7 +1184,7 @@ \section{Fireball Diameter and Height}
 
 \begin{figure}[!h]
 \begin{center}
-\includegraphics[height=4.in]{SCRIPT_FIGURES/Scatterplots/FDS_Fireball_Diameter}
+\includegraphics[height=3.in]{SCRIPT_FIGURES/Scatterplots/FDS_Fireball_Diameter}
 \end{center}
 \caption[Summary of fireball diameter predictions]
 {Summary of measured and predicted maximum fireball diameter.}
@@ -1194,7 +1194,7 @@ \section{Fireball Diameter and Height}
 
 \begin{figure}[!h]
 \begin{center}
-\includegraphics[height=4.in]{SCRIPT_FIGURES/Scatterplots/FDS_Fireball_Height}
+\includegraphics[height=3.in]{SCRIPT_FIGURES/Scatterplots/FDS_Fireball_Height}
 \end{center}
 \caption[Summary of fireball height predictions]
 {Summary of measured and predicted fireball height.}