Pets

What Size Collar Does Your Dog Need?

Built by Kevin Glover · @gloverbuilds · Verified formula

Find the correct collar size by breed or neck measurement. Plus width recommendations by dog size.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

How to Measure Your Dog's Neck
Collar Width by Dog Size

Comment Mesurer

Mesurez le tour de cou avec un mètre souple, à la base du cou. Ajoutez 2-3 cm pour le confort. La règle des 2 doigts : vous devez pouvoir glisser 2 doigts entre le collier et le cou. Trop serré : irritation et difficulté respiratoire. Trop lâche : le chien peut s'en défaire en reculant.

Tailles par Race

Toy (Chihuahua, Yorkie) : 20-28 cm. Petit (Carlin, Beagle) : 28-38 cm. Moyen (Cocker, Bouledogue) : 36-50 cm. Grand (Labrador, Golden) : 46-60 cm. Géant (Rottweiler, Dogue Allemand) : 56-70 cm.

⚡ CalcWolf Insight

Breakaway collars are essential for dogs left unsupervised in areas where the collar could snag on branches, fences, or crate wires. Standard buckle collars can cause strangulation if caught. Use a breakaway collar for everyday wear and switch to a standard collar for walks.

Frequently asked questions

Comment savoir la taille ?▾

Tour de cou + 2-3 cm. Vérifiez avec la règle des 2 doigts. Entre deux tailles : choisissez la plus grande.

Collier ou harnais ?▾

Collier : chiens qui ne tirent pas. Harnais : chiens qui tirent (distribue la pression au thorax), races brachycéphales (Bouledogue, Carlin), et chiots en apprentissage.

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Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →