How do I know which interdental brush size is right for me?
When choosing your correct size there are many considerations. Please know the best sizing recommendation is from your dental professional. Each space between your teeth may be different, so you might need multiple sizes. The bristles should fit snugly between the teeth and the wire should not touch either adjacent tooth. Do not force a brush into a space, and there should be no signs of pain, otherwise size down to a smaller size.
Interdental Brush Size Guide