How to make characteristics align vertically

Can someone help me to work out how to align characteristics in the product display page vertically rather the the default horizontal? In my case its a range of sizes.

Solved this myself!
1. Go to the Characteristics edit screen
2. Edit the value(s) of the characteristic
3. At the end of the 'name' field add '<br />'
4. If your using other languages, add the same to the name field on each language tab.

Note: Adding '<br />' to the name field in the 'Main Information' tab dosen't seem to get saved - Nicolas?

A more elegant solutions is to use CSS:

table.hikashop_product_characteristics_table label {
float:left;
clear:right;
font-weight:normal;
}

table.hikashop_product_characteristics_table .inputbox {
margin-top:5px;
margin-right: 10px;
float:left;
clear:left;
}