I'd like to use the \typearea package in order to properly calculate the size of the text block. However, invoking the package sets the paper size at A4, and I want to use a smaller size. Here's a MWE, commenting out the \usepackage...{typearea} line results in the correct paper size.
%!TEX TS-program = xelatex
%!TEX encoding = UTF-8 Unicode
\documentclass[12.5pt,headsepline]{book}
\usepackage[paperheight=7in,paperwidth=4.25in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{fontspec,xltxtra,xunicode}
\defaultfontfeatures{Mapping=tex-text}
\setromanfont[Mapping=tex-text]{Georgia}
\setsansfont[Scale=MatchLowercase,Mapping=tex-text]{Gill Sans}
\setmonofont[Scale=MatchLowercase]{Andale Mono}
\usepackage[fontsize=12.5]{scrextend}
\usepackage[Conny]{fncychap}
\usepackage{scrextend}
%\usepackage[BCOR=10mm,DIV=calc,pagesize]{typearea}
\usepackage{anyfontsize}
\title{Page Size Problem}
\date{}
\usepackage{kantlipsum}
\begin{document}
\mainmatter
\chapter{Chapter title}
\section{Section title}
\kant[1-15]
\end{document}
book
have no effect.