Nose Bridge to Nose Width Ratio: Formula, Meaning and Worked Example

Key facts

• Formula: alar nose-base width ÷ nose-bridge width
• Measured from the front view, in the nose region of FaceIQ Labs' Harmony measurement guides
• Lower result: the bridge is broader relative to the base
• Higher result: the bridge is narrower relative to the base
• Worked example: a 36-unit base over an 18-unit bridge gives 2.0; a 15-unit bridge at the same base width gives 2.4
• Example values are not a target range and are not measurements of the guide's schematic
• FaceIQ Labs describes this as a FaceIQ adaptation; the linked research has not directly validated this exact formula or its score
• Cited source: Tavakoli et al. (2023), in which 203 volunteers rated edited nose features on one male and one female model
• Bridge shadows can be mistaken for anatomical borders, and the division order is the reverse of what the report label may suggest

What is the Nose Bridge to Nose Width ratio in FaceIQ Labs?

The Nose Bridge to Nose Width ratio is a front-view Harmony measurement in FaceIQ Labs' facial analysis. It divides the alar nose-base width by the nose-bridge width, describing how strongly the nose widens from the bridge down to the base. It is one of the Harmony facial ratios in FaceIQ Labs' measurement guides, listed under the nose region.

How does FaceIQ Labs calculate the Nose Bridge to Nose Width ratio?

FaceIQ Labs calculates the Nose Bridge to Nose Width ratio as alar nose-base width divided by nose-bridge width. The guide's schematic labels the base width as A and the bridge width as B, with lines showing the landmarks used. The schematic is not to scale and is not an ideal face or a scored result.

What does a lower or higher Nose Bridge to Nose Width result mean?

In FaceIQ Labs' Harmony analysis, a lower Nose Bridge to Nose Width result means the bridge is broader relative to the nose base, and a higher result means the bridge is narrower relative to the base. The ratio gives context about nasal taper that a single nose-width measurement cannot show on its own.

What does a worked example of the Nose Bridge to Nose Width ratio look like?

FaceIQ Labs gives two worked examples of the Nose Bridge to Nose Width calculation. A 36-unit nose base over an 18-unit bridge gives 2.0, and a 15-unit bridge at the same base width gives 2.4. These values explain the arithmetic only; they are not a target range and not measurements of the guide's schematic.

Is there an ideal range for the Nose Bridge to Nose Width ratio?

FaceIQ Labs' guide for the Nose Bridge to Nose Width ratio does not publish an ideal range or target value, and its worked-example numbers are explicitly not targets. More generally, FaceIQ Labs compares its 70+ Harmony ratios and angles to ideal ranges adjusted for gender and ethnicity, and describes its reference ranges as model settings.

Where does the Nose Bridge to Nose Width measurement come from?

FaceIQ Labs describes the Nose Bridge to Nose Width ratio as a FaceIQ adaptation: a landmark-based description of facial shape. The linked research gives background on facial measurement or perception, but it has not directly validated this exact formula or its score. FaceIQ Labs says its score weights and reference ranges are model settings.

What research does FaceIQ Labs cite for this measurement?

FaceIQ Labs cites one source on this guide: Tavakoli et al. (2023), "Ideal Nasal Preferences: A Quantitative Investigation with 3D Imaging in the Iranian Population." It asked 203 volunteers to rate edited nose features on one male and one female model. FaceIQ Labs says it supports studying angles and projection together, with limits from the sampled faces and raters.

What should I watch for when reading my Nose Bridge to Nose Width result?

When reading a Nose Bridge to Nose Width result in FaceIQ Labs, watch for two things. Bridge shadows can be mistaken for anatomical borders of the bridge, and the division order is base width divided by bridge width, the reverse of what the report label may suggest. Either can lead to misreading the number.

Which other FaceIQ Labs Harmony guides cover the nose region?

• Nose Tip Position
• Intercanthal-Nasal Width Ratio
• Ipsilateral Alar Angle
• Midface–Jaw Angle Difference

Frequently asked questions

What does the Nose Bridge to Nose Width ratio measure?

It measures how strongly the nose widens from bridge to base, using alar nose-base width divided by nose-bridge width from the front view in FaceIQ Labs' Harmony analysis.

Is a higher or lower Nose Bridge to Nose Width ratio better?

FaceIQ Labs' guide does not label either direction as better. A lower ratio means the bridge is broader relative to the base; a higher ratio means the bridge is narrower relative to the base.

Which number is divided by which in this ratio?

The alar nose-base width is divided by the nose-bridge width. FaceIQ Labs notes this is the reverse of what the report label may suggest.

What is an example of the calculation?

A 36-unit base over an 18-unit bridge gives 2.0, and a 15-unit bridge at the same base width gives 2.4. These are illustrations, not target values.

Has research validated FaceIQ Labs' Nose Bridge to Nose Width score?

No. FaceIQ Labs calls it its own adaptation and says the linked research, Tavakoli et al. (2023), gives background on facial measurement or perception but has not directly validated this exact formula or its score.

What common mistake affects this measurement?

Bridge shadows can be mistaken for the anatomical borders of the bridge, which can distort how the result is read.