Introduction
When choosing Kyunglas, the number one concern for most dog parents is size. Will it fit my dog’s face? Is it too big or too small? If you’re purchasing for the first time, it’s natural to feel unsure.
That’s why we’ve created a sizing method that’s both easy and accurate. With just one measurement, you can find the right Kyunglas fit for your dog. And if you’re still not sure, we’re here to help — just send us your dog’s head size and a side profile photo.
We’ve fitted countless dogs with Kyunglas and will guide you with care.

Why Proper Fit Matters
Kyunglas isn’t just a fashion item. It’s a functional dog goggle with toric lenses — designed to protect your dog’s eyes and provide a clearer field of vision.
To make sure it stays on securely and works as intended, getting the right size is key. If the goggles are too loose, they may slip or fall off. That’s why we’ve simplified the sizing process for everyone.
Kyunglas Sizing Overview
Kyunglas sizes are based on two things: head circumference and facial structure.
First, identify which facial structure best matches your dog:
- Standard (Long Muzzle): Longer, more pronounced snout
- Flat-Faced (Short Muzzle): Shorter nose, flatter facial profile
You’ll only need to measure your dog’s head circumference. For flat-faced dogs, we recommend consultation before purchase as facial shapes can vary widely.
📏 Size Chart (cm)
| Facial Structure | Size | Head Circumference (cm) |
|---|---|---|
| Standard (Long) | Small | 22 – 29 |
| Standard (Long) | Medium | 30 – 38 |
| Standard (Long) | Large | 39 – 46 |
| Flat-Faced (Short) | – | 30 – 37 (consultation required) |

📐 Size Chart (inch)
| Facial Type | Size | Head Circumference (inch) |
| Standard (Long) | Small | 8.6 – 11.4 |
| Standard (Long) | Medium | 11.8 – 14.9 |
| Standard (Long) | Large | 15.3 – 18.1 |
| Flat-Faced (Short) | – | 11.8 – 14.5 (consultation required) |

For flat-faced dogs, head size alone doesn’t guarantee the right fit. Nose bridge length, eye placement, and jaw shape can all affect how the goggles sit. That’s why a brief consultation is highly recommended.
How to Measure Head Size
All you need is one measurement — head circumference:
- Use a soft measuring tape. If you don’t have one, use string and a ruler.
- Start in front of one ear, go under the jaw, and wrap around to the other ear.
- Measure snugly (like measuring a waist), not loosely.
- Record in cm or inches.

For Dogs with Flatter Faces
Dogs with flatter faces or shorter noses may require extra attention when choosing the right fit. That’s why we offer personal size checks to ensure their comfort and safety.
What We Need for Consultation:
- Your dog’s head circumference
- At least one clear side-profile photo
Send us these two items, and we’ll help you find the most suitable Kyunglas fit — without pressure on the face and with proper eye alignment.
Why Kyunglas Is Different
Kyunglas is the only dog goggle designed with optical engineering tailored to canine head shapes and vision structure.
We studied real-life dog face data to design goggles that fit securely and comfortably — whether your dog has a short nose, rounder cheeks, or differently placed ears.
Every dog is unique. Their gear should be too.
Need Help Choosing?
Not sure which size to choose? Or feel like your dog has a unique head shape?
📩 Just send us the head size and a side photo — we’ll handle the rest.
Kyunglas – Goggles that truly fit your dog.
From eye protection to everyday comfort, we design for every moment you share together.
Want to explore the full Kyunglas collection or make a purchase?
👉 View Kyunglas Goggles Here
Curious about what makes Kyunglas so unique?
👉 KYUNGLAS: 14 Proprietary Innovations in Canine Eyewear