What Browser are you using ?
You pick the design your interested in.
Then the next page you select the size. ( this is a extra step because it is a universal product, Not a vehicle specific part . Parts dont have size options )
Then in the top right it give you a price for the size you selected and a add to cart button . you should end up here depending on the isze and design you picked
http://store.ballist...l/I-525854.aspx
Under the pic it list the other sizes available to that product .
The site is built on a standard with my distributors. It is a system I share with other large auto sites like THMOTORSPORTS or FullThrottleNYC . Play around and you will see how it works better to understand it is more parts driven . Try looking up a part with a vehicle selected and without one . You will get a better feel for the site . It was not designed for clothing with is available in different sizing . So you have to give each size a part#

I just tried it on Chrome , Safari , Explorer and Firefox . LMK if you still have a issue