# Modifying the size of an asymptote image in latex export

I have been using Asymptote to make pictures that can be included in Latex documents. I recently discovered that Org mode plays well with Asymptote

https://orgmode.org/worg/org-contrib/babel/languages/ob-doc-asymptote.html#orgbded9e5

I was able to successfully compile a Latex document with embedded Asymptote code as follows.

#+TITLE: Test Document
#+AUTHOR: A. U. Thor
#+latex_class_options: [10pt]
#+OPTIONS:      toc:nil

#+BEGIN_SRC asymptote :file test.pdf
include graph;
size(1inch);
filldraw(circle((0,0),1),yellow,black);
fill(circle((-.3,.4),.1),black);
fill(circle((.3,.4),.1),black);
draw(arc((0,0),.5,-140,-40));
#+END_SRC


This generates the document as in the screenshot below.

How can I adjust the instructions in the header of the code-chunk above, to be able to manipulate the size and placement (left/right/center) of the image? Right now the image is just too big.

Note: If it helps, the generated \LaTeX source file, exported from the Org file looks like this

% Created 2019-04-13 Sat 15:26
% Intended LaTeX compiler: pdflatex
\documentclass[10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{grffile}
\usepackage{longtable}
\usepackage{wrapfig}
\usepackage{rotating}
\usepackage[normalem]{ulem}
\usepackage{amsmath}
\usepackage{textcomp}
\usepackage{amssymb}
\usepackage{capt-of}
\usepackage{hyperref}
\usepackage{minted}
\usepackage[margin=0.5in]{geometry}
\usepackage{parskip}
\usepackage{graphicx}
\usepackage{asymptote}
\author{A. U. Thor}
\date{\today}
\title{Test Document}
\hypersetup{
pdfauthor={A. U. Thor},
pdftitle={Test Document},
pdfkeywords={},
pdfsubject={},
pdfcreator={Emacs 26.1 (Org mode 9.1.9)},
pdflang={English}}
\begin{document}

\maketitle
\begin{center}
\includegraphics[width=.9\linewidth]{test.pdf}
\end{center}
\end{document}


#+BEGIN_SRC asymptote :file test.pdf