I think it probably used to be a match. But people do not use them as much anymore.
It could well be coins. The removal of 1 and 2 cent coins have increased the size of the smallest coin we use. The 5 cent weights 3.92g the 1 cent weighed 2.30g. And the increased use of cards and phone payment means coins seem to be on the way out.
It could well be a hairclip, though I am not sure how close they come to the majority of people using them.
Pills could well be the answer. It seems reasonable that close to the majority of people in the western world take a pill every day.
Are the tools we use getting larger over time? Smartphones have replaced big tools like walkmen and cameras for many of us. But maybe in some way they have also replaced small tools like coins and matches?