There are two recommended ways to navigate these pages.

Method 1.
Click the search engine. This will lead you to the FULL INDEX and search engine for the site. All the indexes have hyperlinks to the page you are looking for.
Use the back button or search engine button after viewing to select another page.

Method 2.
MOST OF THE INFORMATION (including sizes) can be found  from the products.
Having selected the product you may be interested in, either Click the picture or the underlined description.
On some pages you can click various options to find more information.

GOOD BROWSING.