Dog Harness & Collar Size Guide
Finding the right fit ensures your dog stays comfortable, safe, and secure during daily walks and outdoor training. Use our measurement instructions and comprehensive size charts below to choose the perfect fit for your pet.
📏 How to Measure Your Dog
1. Chest Girth (Crucial for Harnesses)
Measure around the widest part of your dog's ribcage, approximately 2–3 inches behind their front legs.
2. Neck Girth (For Collars & Harnesses)
Measure around the base of the neck where a collar naturally sits comfortably.
- Two-Finger Rule: Always make sure you can comfortably slip two fingers between the strap and your dog's body.
- Between Sizes: If your dog falls between two sizes, choose the larger size for optimal comfort and adjustability.
🐕 MASBRILL Reflective Dog Harness No Pull with Handle
Ergonomic vest harness with reinforced top handle, multi-point adjustment straps, and high-visibility reflective stitching.
| Size | Neck Girth (min.–max.) | Chest Girth (min.–max.) | Breed Reference |
|---|---|---|---|
| S | 13.5"–18.8" (34–48 cm) | 18.0"–24.0" (46–61 cm) | Pug, French Bulldog, Jack Russell, Boston Terrier |
| M | 15.5"–22.8" (39.5–47 cm) | 22.6"–28.9" (57.5–73.5 cm) | Beagle, Border Collie, Corgi, Cocker Spaniel |
| L | 17.7"–23.8" (45–60.5 cm) | 26.0"–34.8" (66–88.5 cm) | Golden Retriever, Labrador, Boxer, Standard Poodle |
| XL | 19.6"–29.1" (50–74 cm) | 29.0"–37.5" (73.5–95.5 cm) | German Shepherd, Rottweiler, Mastiff, Doberman |
💡 MASBRILL LED Light-Up Dog Harness
360° high-visibility glowing LED vest harness for maximum nighttime safety and breathable mesh comfort.
| Size | Neck Girth | Chest Girth | Fit Description |
|---|---|---|---|
| Small | 18.11" (46 cm) | 21.26"–25.20" (54–64 cm) | Small to Medium Breeds |
| Medium | 20.87" (53 cm) | 24.41"–28.35" (62–72 cm) | Medium Breeds |
| Large | 22.83" (58 cm) | 27.56"–31.50" (70–80 cm) | Large Breeds |
✨ MASBRILL LED Light-Up Dog Collar
Rechargeable luminous collar with optical fiber glow and durable quick-release buckle.
| Size | Min / Max Length | Width |
|---|---|---|
| S | 10–14.5" / 25–37 cm | 0.98" / 2.5 cm |
| M | 12.6–18.5" / 32–47 cm | 0.98" / 2.5 cm |
| L | 13.8–22.4" / 35–57 cm | 0.98" / 2.5 cm |
| XL | 16"–26.3" / 41–67 cm | 0.98" / 2.5 cm |
⚠️ Important Collar Notes:
- This collar is not suitable for dogs weighing less than 10 kg (approx. 22 lbs).
- When adjusting the collar size, the optical fiber part can be adjusted freely without worrying about damage to the collar.
⚡ Training & Bark Collars (Universal Fit)
Our remote training collars and smart bark collars feature an adjustable strap fitting neck sizes from 20 cm to 68 cm (8" to 27"), suitable for dogs weighing 8 lbs to 110 lbs.
Excess strap length can be neatly trimmed after adjusting for your dog's custom fit.
⚠️ Important Notice for Customized & Personalized Items
Please double-check your dog's neck and chest measurements carefully before placing an order for personalized or custom-engraved items.
Please note: Because customized products are tailored specifically for your pet, returns, refunds, and size exchanges are not supported once production has started, except in the case of verified manufacturing defects or quality issues.
Still unsure about which size to pick?
Feel free to contact our customer support team with your dog's breed, weight, and measurements, and we will gladly help!