Make All Shop Items Description Boxes the Same Size.

Hello,

On this page: http://m40.siteground.biz/~heartcor/vitalfeet.com/shop/

Is there a way with CSS to standardized the description section of the item boxes so they are all the same height? (See attached picture).
Ideally, the area with text under each picture would be the same size as that of the items which have three lines of text (such as the boot in the picture).

Cheers,
Casper