Each item has a title announcing it's production quantity.
This indicates how many of that particular item will be produced for the current drop/collection. The item may be featured in future collections; 1of1 items are an exception to this rule.
Any item with 1of1 stated in the title is hand crafted and will be limited to that single item, never to be produced again; your piece will never be crafted again and will remain unique to you.