Lots of people seem to be adopting this as their new year's resolution. Not buying any new clothes in 2020. Exception made for things like underwear or tights which really can't be repaired, and which you might not want to buy used.
But no new tops, jeans, dresses, shoes, coats etc. If you have some sort of occasion which you genuinely have nothing suitable for, you borrow from a friend or buy second hand.
Now I don't have an enormous wardrobe, but probably could get through the whole year with what I have already and without buying more. I think all of us have got into the habit of buying new just because it's cheap, or just because we can, or because we don't fancy wearing something we've already got, or it's not the latest fashion, or just because we fancy something new, or because there are apparently some people who can't be seen wearing the same thing more than once on social media.
Obviously with kids it's tricky as they tend to grow. But for adults who have a wardrobe full of stuff already, how hard can it be not to buy more? Or mend things rather than chuck them out?