Choosing the right size for your dog's collar and harness is crucial for their comfort and safety. It's essential never to use products at the very end of the size range, instead, opt for the next size up for optimal comfort. Here's a guide to help you make the perfect choice:


Measuring Your Dog for Collars


To ensure a comfortable and safe fit, measure your dog's neck where the collar would naturally sit. Use a soft measuring tape, wrapping it snugly around the neck, allowing enough space to slide two fingers between the tape and your dog's neck. This space ensures that the collar will be tight enough to stay on but loose enough to be comfortable.


Important: Remember, the collar size you choose should reflect the measurement you've taken, plus the two-finger allowance for safety and comfort.


Measuring Your Dog for Harnesses


Finding the right harness size is a bit more involved but equally important. The key measurement for a harness is the chest circumference. Measure your dog's chest at its widest point, which is typically right behind the front legs. Again, ensure there's enough room to slide two fingers between the measuring tape and your dog's body.


Important: For harnesses, the chest measurement is crucial. Always double-check this measurement and compare it with the size guide of the specific brand you're considering.


Tips for a Perfect Fit


  • Check the product’s size guide: Every brand may have slight variations in sizing, so it’s important to refer to the specific size guide provided for the product you are interested in.
  • Consider your dog’s growth: If your dog is still growing, choose a size that offers some room to grow, or look for adjustable options.
  • Adjustability is key: Opt for collars and harnesses that offer adjustability to fine-tune the fit after trying it on your dog.
  • When in doubt, size up: If your dog’s measurement is between sizes, it’s generally safer to go for the larger size for comfort.

With these measurements and tips in mind, you'll be well on your way to selecting the ideal collar and harness that ensures your dog's comfort during walks, training, and adventures.


For detailed size charts and further assistance, continue scrolling through our size guide summary page, where you’ll find specific tables for all the brands we carry.




Red Dingo Sizes



Red Dingo dog harness sizing

Size Chest Circumference Neck Circumference Back size Width
XS 29 - 42 cm 25 - 39 cm 7 cm 1.2 cm
Small 36 - 54 cm 30 - 48 cm 8.5 cm 1.5 cm
Medium 45 - 66 cm 36 - 59 cm 11 cm 2.0 cm
Large 53 - 78 cm 46 - 76 cm 13.5 cm 2.5 cm
XLarge 71 - 113 cm 62 - 109 cm 18 cm 2.5 cm

Red Dingo dog collars

XS : 20 - 32 cm x 1,2 cm (8-13 in x 0,4 in)

Small : 24 - 36 cm x 1,5 cm (9-14 in x 0,6 in)

Medium : 31 - 47 cm x 2,0 cm (12-19 in x 0,8 in)

Large : 41 - 63 cm x 2,5 cm (16-25 in x 1,0 in)

Red Dingo Martingale collars

Small: 25 - 39 cm x 1,5 cm (10-15")

Medium :32 - 47 cm x 2,0 cm (12-18")

Large : 41 - 62 cm x 2,5 cm (16-24")



Important: For dog harnesses, please always check the chest size behind the front legs


Rogz Sizes


RogLoc system: Large & XLarge sizes

Rogz dog harness sizing

Size Chest Circumference Neck Circumference Width
Small 20 - 35 cm 20 - 30 cm 1.2 cm for puppies & small Dogz - Toy Poodles,Chihuahua....
Medium 30 - 50 cm 26 - 38 cm 1.6 cm for small Dogz - Scotty, Pug, Terrier, ....
Large 45 - 75 cm 34 - 54 cm 2.0 cm for medium Dogz - Spaniel, Boxer, ....
XLarge 60 - 95 cm 43 - 70 cm 2.5 cm for large Dogz - Labrador, Rotweiler, Bouvier

Rogz dog collar

Small : 20-30 cm x 1,1 cm (8-12") - for puppies & small Dogz - Toy Poodles,Chihuahua.....

Medium : 26-38 cm x 1,6 cm (10-16") - for small Dogz - Scotty, Pug, Terrier, ....

Large : 34-54 cm x 2,0 cm (13-22") - for medium Dogz - Spaniel, Boxer, ....

XLarge : 43-70 cm x 2,5 cm (17-29") - for large Dogz - Labrador, Rotweiler, Bouvier

XXL : 50-80 cm x 4,0 cm (20-32")

Rogz half-check collar

Medium : 26-38 cm x 1,6 cm (10-16") - for small Dogz - Scotty, Pug, Terrier, ....

Large : 34-54 cm x 2,0 cm (13-22") - for medium Dogz - Spaniel, Boxer, ....

XLarge : 43-70 cm x 2,5 cm (17-29") - for large Dogz - Labrador, Rotweiler, Bouvier


Max and Molly Sizes



Max and Molly dog harness sizing

Size Chest Circumference Neck Circumference Width
XS 32 - 40 cm 24 - 39 cm 1.0 cm
Small 41 - 52 cm 30 - 46 cm 1.5 cm
Medium 53 - 69 cm 36 - 58 cm 2.0 cm
Large 70 - 98 cm 46 - 77 cm 2.5 cm

Max and Molly dog collar

XS : 22 - 35 cm x 1,0 cm (9-13 in x 0,4 in)

Small : 28 - 45 cm x 1,5 cm (11-17 in x 0,6 in)

Medium : 34 - 55 cm x 2,0 cm (13-21 in x 0,8 in)

Large : 39 - 62 cm x 2,5 cm (15-24 in x 1,0 in)