Choosing the right mouthpiece size is crucial for your comfort and the effectiveness of our product. Here's
a straightforward guide to help you make the best choice:
Which Size Should You Choose?
Large Size
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This is suitable for most adults.
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Ensures a snug, comfortable fit for best effectiveness.
Small Size
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Designed for teens and adults with smaller mouths.
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Slightly narrower and shorter for a more precise fit.
Mouthpiece Dimensions
| Small |
4.7 cm |
6.0 cm |
2.5 cm |
Teens & small adult mouths |
| Large |
5.0 cm |
6.7 cm |
3.0 cm |
Most adults |
How to find your size
Not sure which size to pick? Here's the easiest way to measure — no guesswork needed.
1. Take a Bite:
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Grab a slice of bread (or anything soft that holds a bite mark) and bite down naturally.
2. Measure Your Bite Width:
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Using a ruler, measure the bite mark from molar to molar — the widest part of your bite.
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Width is the most important measurement, so measure carefully.
3. Pick Your Size for R1:
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Less than 6.0 cm → Go with Small (4.7 cm L × 6.0 cm W × 2.5 cm H) — best for teens & smaller adult mouths.
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6.0 cm or more → Go with Large (5.0 cm L × 6.7 cm W × 3.0 cm H) — best for most adults.
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Tip: Your bite width should be slightly smaller than the size you choose. If you're between sizes, go one size up for a more comfortable fit.
Need help on how to measure?
Watch our 40-second sizing video to see exactly how it's done —
watch the video
Already found your fit? Purchase Now
If you're still uncertain about which size to choose, feel free to reach out to me at
ken@getreviv.com.