Ordering of product attribute options

Hi,

Is there a way to control the order in which attribute options are displayed?  An example is size where originally sizes 37 - 42 were loaded and therefore appear in the correct order on the drop down list on the cart.  An extra size 36 option has been added and appears as the last entry on the product->attributes screen and also in the drop down list on the cart.  I would like to be able to re-order the values so they go from small ->large rather than order entered.  I thought a simple drag and drop may have been available to re-order, however, haven't found anything.

Thanks