Hi, I wondered if anyone can tell me how do I list "One" Pendant with a choice of multiple length of Chain choice’s. 
so I have one Pendant and want to offer the buyer to choose a 45cm, 50cm, 55cm or 60cm chain included with the Pendant.

I have gone through the process and if I sell one variation does it remain active with just that choice removed (if I marked the qty as 1) or when sold say with a 45cm chain when sold is the listing all sold or does it relist with the other variations still? 

I appreciate any replies.

regards Sharon