How long does buyer have to return an item for refund?

[Lilyloo]

Bought on 13 November.
Opened a dispute in resolution centre before contacting me on 20 November.
I have said i am happy to give refund on return of items.
Still no sign of them.
The money is being held by paypal.
How long does buyer have to return items ?
Thanks

I think they have got 7 days to put tracking info into paypal, after which time paypal close the dispute.

So do i have to do anything then ?
Have replied to his dispute in the resolution area saying i will give full refund on return of items on 21st Nov.
Would they have 7 days from then ?

it should give a date when the dispute expires

He has put it in resolution centre and it says he or i can escalate to a claim until 10 Dec.
So i just wait until then and presume i get the money back if items not returned ?
Just wish he would return so i can relist for xmas.
I haven't got money or items !!