GUM® Interdental Size Indicator

Easy choice. Tailored care.

Discover our new GUM Interdental Size Indicator. Watch the video.

From Europe’s #1 interdental brand comes a smarter & easier way to size.

Prescribe the right brush, every time – with confidence

GUM-Interdental Size Indicator with GUM TRAV-LER and ISO sizes

Simple sizing

With our new GUM Interdental Size Indicator, you can choose the right brush size in just seconds — compatible with GUM TRAV-LER® interdental brushes and soon also with GUM BI-DIRECTION.

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GUM-Interdental Size Indicator in action inserted into interdental spaces

How it works

Insert gently into the interdental space. Do not force. Observe the visible color at the gum line – this indicates the correct size. Match the colour to the GUM TRAV-LER and GUM BI-DIRECTION brush.

GUM-Interdental Size Indicator in action between teeth

The colour you see is the brush your patient needs

For brushes sizes ISO 1 to ISO 5, match the colour shown on the GUM Interdental Size Indicator to the GUM TRAV-LER and GUM BI-DIRECTION brush colour.
If the GUM Interdental Size Indicator doesn’t fit, recommend ISO 0 size.
For larger gaps (ISO 6+), fit brushes directly.

GUM TRAV-LER Interdental Brush shown like a fan in several sizes and colours

Tailored care with GUM TRAV-LER

Our GUM Interdental Size Indicator works seamlessly with the GUM TRAV-LER range of 10 brushes, helping you prescribe the ideal size for each patient’s unique interdental spaces.

Smiling woman is using GUM TRAV-LER to clean between teeth

From Europe’s Nr 1 Interdental brand

Trusted by dental professionals and patients alike, our interdental tools are crafted for comfort, efficacy and lasting satisfaction.

9/10 users find GUM TRAV-LER easy and comfortable to use.**

GUM Interdental Size Indicator prescription pad with a mouth shown as infographic

Give your patients a better fit, greater comfort, and more precise results

GUM stands by your side — not just with trusted products, but with smart tools that elevate your clinical expertise.

Benefit from our complete in-office interdental sizing kit, including our new GUM Interdental Size Indicator, sample brushes, and a prescription pad with mouth diagrams - making it easy for patients to understand and follow your personalized recommendations.

download the prescription pad

**SUNSTAR Quantitative User Test: Product Benchmarking Interdental brushes (March 2025).