I'm sure there's a simple answer to this one, I just can't find it...

How do I set up shipping costs for individual items?

For example, I have a rabbit hutch that I want to charge £12.50 for shipping but I have a guinea pig run that I want to charge £8 for shipping.

I can't seem to find an option when adding an item to set the cost?

Any help would be much appreciated.

Arkie...