HTML table – my images are too close together.

Hi,

I am new to WordPress and HTML, but I have learned a little in the last couple of weeks.

I put an HTML table on my “Store” page, and uploaded my images in the cells. But they are so close together! I can easily make the spaces between the rows bigger, but not the cells. I think it can be fixed with some code, but I looked into cell spacing and cell padding, and I am not doing it right. I don’t have the right code, or I’m not putting it in the right place.
http://www.elisabethmaurland.com/store/

I would love some help!
Thanks!