[alec.thomas]

you would need to change this in main.css

 
.products-list .image {
float: left;
position: relative;
padding: 3px 20px 3px 10px;
margin-right: auto;
}

with this

 
.products-list .image {
  float: left;
  position: relative;
  padding: 3px 20px 3px 10px;
  margin-right: auto;
  border: thin solid #000000;
}