Radio buttons not showing in chrome

hi. I have a site with some radio buttons that aren't showing in Chrome.

It works fine in IE and Firefox, but the radio buttons won't show in Chrome.

This is an ecqid store.

http://www.engravablecreations.com/personalized-bamboo-cutting-board-15-x-12-handle-design-options/#!/Personalized-Cutting-Board-Custom-Engraved-Bamboo-Cutting-Board-15-x-12-Handle-Design-1/p/43745079/category=11219421

I've attached a screen shot of them side by side.

What can I do to get these radio buttons to show?

Thanks,