I recommend Daiso interdental brushes.

I use it occasionally now, but I recommend the Daiso interdental brush.

I originally only used dental floss, but I found out that I should use interdental brushes as well.

So, I bought one from Daiso as a beginner's item and tried it out, and it was pretty good.

I use a different one now, but I recommend this as a light introductory tool for those who, like me, are using an interdental brush for the first time.

The back shows images of the sizes to fit your teeth, so you can just pick the one that fits and buy it haha.

Or since they're cheap, wouldn't it be okay to buy them in every size and test them out?