How can make the characteristics options in order

-- url of the page with the problem -- : dev.smderangospizza.com/index.php/order-...ct/115-buffalo-wings
-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.3.6
-- PHP version -- : 5.4.35
-- Browser(s) name and version -- : Chrome and firefox

Hello Everyone, first of all too many thanks to nick and specially Xavier, my question is how i can sort the options, so when you click the link i have provided then you click on the options of the how many pieces of chicken wings, the drop menu will show 10, 15 , 5 , then rest of the list, How i can make it in order 5,10,15,20,25,30,40,50,100?
Thanks

Never mind I fixed it, thanks in all cases