The Humble Co Bamboo Interdental Brush Size 5 Green Humb 1 Unit 300 g

Are these some kind of counterfeit product? I ask because the size of the brushes bears no resemblance to the size of 0.80mm brushes purchased from high street retailers. They are far too large to use by anyone except people with exceptionally wide gaps between their teeth.

No one should be buying these in plastic any more

The bristle part detaches from the handle and gets stuck in your teeth. They're also a bit fierce