It's a little bit of a tight fit - doesn't go all the way in - but that's a lot better than being so loose that it falls out of the handle.

This is my first set of replacement heads for my bamboo toothbrush, and I'm really pleased with the way the new head fits tight into the first generation base. I got major compliments from my dentist about how little plaque I had after 4 months of exclusively using this toothbrush. Plus I love the feel in my hand and the softness of the bristles (while still getting the job done).

I feel good about using a toothbrush that is not made of plastic. It's easy to hold and use. I just bought two more replacements, so I will be using this instead of plastic from now on. Love all your products!

I really want to like these because I have several. So far the two I have used fit too loosely in the handle. They pop out every time I brush my teeth. I threw one away thinking it was a fluke, but the second one is doing the same thing. Is there some trick to get it to stay in the handle that I’m missing. I don’t want to glue it in there because that would defeat the purpose. I love how soft the bristles are!

The toothbrush head is in the smaller side and soft. I absolutely love it.