find size of the text code example
Example 1: text size
{\large this text is slightly bigger than normal}, this one is not.
Example 2: text size
\documentclass[12pt,a4paper]{report}
\usepackage{graphicx}
\begin{document}
\begin{titlepage}
\centering
\includegraphics[width=0.15\textwidth]{example-image-1x1}\par\vspace{1cm}
{\scshape\LARGE Columbidae University \par}
\vspace{1cm}
{\scshape\Large Final year project\par}
\vspace{1.5cm}
{\huge\bfseries Pigeons love doves\par}
\vspace{2cm}
{\Large\itshape John Birdwatch\par}
\vfill
supervised by\par
Dr.~Mark \textsc{Brown}
\vfill
% Bottom of the page
{\large \today\par}
\end{titlepage}
\end{document}