Size Guide
We want to ensure that your bestie’s collar is the perfect fit. Please refer to the size guides below for information on how to measure for your new collar.
Please do not guess your pet’s size. Our collars are made to order and once an order is placed, we consider it final.
To get the most accurate measurement, we highly recomment using a flexible measuring tape. You can buy one online or print it out and tape it together.
If you need help or have any questions, please fill out the form on our Contact Us page or email us at ultimuttbestie@gmail.com.
Slip-On & Martingale Collars


Slip-On (O-Ring) & Martingale Collars slide on over your pet’s head. To ensure a proper fit, please follow the instruction below to measure both the head and neck of your pet.

How to Measure:
You will need a flexible measuring tape.
1. Snugly measure around the widest part of your pet’s head, which is normally just in front of the ears.
2. While your pet is still and standing, measure the middle of your pet’s neck, where their collar normally sits.
Select the larger size when choosing your pet's collar (i.e. if your pet has a 20” head and 19” neck, select 20” in the size drop-down).
* Please choose the size based on your measurement, we accommodate for the beads and attachments.
* DO NOT use a hard measuring tape.
Video Guide: Slip-On & Martingale Collars
Side-Release Buckle & Adjustable Collars


Side-Release Buckle and Adjustable Collars snap on and off with ease. To ensure a proper fit, please follow the instruction below to measure the neck of your pet.

How to Measure:
You will need a flexible measuring tape.
1. While your pet is still and standing, measure the middle of your pet’s neck, where their collar normally sits.
* Please choose the size based on your measurement, we accommodate for the beads and attachments.
* DO NOT use a hard measuring tape.
Video Guide: Side-Release Buckle & Adjustable Collars
Breed Size Guide
This guide is the average sizes based on the breeds listed below. Use this guide to see if you are on the right track. Measure your pet using the guides above to ensure your collar is the proper size.

Chihuahua Mixes
8" – 11"

Jack Russel Terrier
11" – 15"

Dachshund
12" – 16"

French Bulldog
13" – 16"

Labradoodle
16" – 20"

Pitbull & Boxers
16" – 21"

Husky
18" – 20"

American & English Bulldog
18" – 24"

Lab
18" – 24"

Rottweiler
20" – 26"

Great Dane
20" – 26"

Mastiff
24" – 28"