Looking for a module or Add On

[hurray 6]

Hi,

I am looking for a ring-size module for my french site. The module would be activated on any or all the categories/pages that contain rings. It would basically collect all the ring sizes available (e.g 56,57,58,59,60 etc) and display them on top of the page with a drop down menu. A customer would then select the size he/she would want and get all the rings corresponding to that size displayed on that page. That way a customer would avoid clicking on each and every ring to check if the ring is available in his size.

Is there a module or add-on that provides this kind of functionality or can someone make one for my site?