TePe Interdental Brush Sizes: How to Pick the Right One
By Oral Health Care &lnterdental Brush- | Published: 2026-10-22
Category: Buying Guides
Learn how to choose the correct TePe interdental brush size for your gaps. Compare sizes, get fitting tips, and find the best option for sensitive gums or back teeth.
Quick answer
To pick the right TePe interdental brush size, start with the smallest size (ISO 0, 0.4 mm) and gently test larger sizes until you feel slight resistance without forcing. Your brush should slide in easily but contact the tooth surface on both sides.
Why size matters for gum health
Using an interdental brush that is too small leaves plaque undisturbed between teeth, while a brush that is too large can push gums away or cause discomfort. The right size removes plaque effectively without bleeding or pain. TePe color-codes each size so you can match the brush to your gap width at a glance.
When to choose Extra Soft vs. Original vs. Angle
TePe offers three handle styles: Original (short straight handle), Angle (long angled handle for back teeth), and Extra Soft (gentler bristles for sensitive gums). The size you need (wire diameter and color) is independent of the handle style. If you have sensitive teeth, dry mouth, or recent oral surgery, the Extra Soft variant is the best choice regardless of gap size. For routine plaque removal in healthy gums, Original or Angle work well.
Decision rules for choosing your TePe interdental brush size
- Start with the smallest size: Begin with ISO 0 (0.4 mm) or ISO 1 (0.45 mm). Insert gently between your teeth. If it goes in without any contact, move up one size. Repeat until you feel slight resistance.
- Check the fit visually: After removing the brush, look at the bristles. They should appear slightly bent or flattened on both sides. If they are straight or only bent on one side, the brush is too small or not angled correctly.
- Match the color code to your gap: TePe uses consistent color codes across all lines (e.g., Orange = ISO 1, 0.45 mm). Once you know your size, you can buy that color in Original, Angle, or Extra Soft as needed. Write down your color code so you can reorder the correct size easily.
- Test with a mirror and good lighting: Stand in front of a well-lit mirror. Insert the brush between each tooth gap one by one. Pay attention to the back molars – they often need a different size than front teeth.
Product facts
- TePe® Interdental Brush Extra Soft Mixed Pack - 0.45 to 1.1 mm: TePe Extra Soft™ Interdental Brushes have Extra Soft bristles for the most gentle clean, recommended for sensitive teeth, dry mouth or after oral surgery, available in 6 sizes. This means you can get a gentle cleaning experience even if your gaps are larger, because the Extra Soft line covers multiple sizes with softer bristles.
TePe® Interdental Brush Extra Soft Mixed Pack - 0.45 to 1.1 mm - TePe® Interdental Brushes Original Orange - 0.45 mm (ISO 1): TePe Original Interdental Brushes are the best-selling brush for removing plaque between the teeth, featuring a straight brush head and short handle, available in 9 sizes. The wide size range (9 sizes) makes the Original line the most flexible option for fitting different gap sizes, especially for front teeth where the short handle is easy to maneuver.
TePe® Interdental Brushes Original Orange - 0.45 mm (ISO 1)
Who should use which TePe interdental brush?
Best for
- People with healthy gums and standard gaps – TePe Original in the correct size
- Those who need extra reach for back teeth – TePe Angle in the correct size
- Individuals with sensitive gums, dry mouth, or post-surgery – TePe Extra Soft in the correct size
Not for
- Very tight gaps that cannot accommodate even the smallest TePe brush (0.4 mm) – consider dental floss or a water flosser instead
- People who prefer a fixed handle length without size options – TePe Angle and Original are available in multiple sizes, but the handle length is fixed per line
