<?php

$sizes = "
					39.5&nbsp;
					40&nbsp;
					40.5&nbsp;
					41&nbsp;
					41.5&nbsp;
					42&nbsp;
					42.5&nbsp;
					43&nbsp;
					43.5&nbsp;
";
preg_match_all('/[\.\d]+/', $sizes, $matches);
print_r($matches[0]);