Size guide
Find the right size for your dog
Measure your dog and select the product to find the recommended size. No measurement replaces common sense: if in doubt, always choose the larger size.


Measure your dog's neck circumference with a soft tape measure, leaving space for two fingers between the tape and the neck.
If your dog is between two sizes, we always recommend choosing the larger one.
Use a soft tape measure (not rigid), have your dog stand in its normal relaxed position, and always leave about two fingers of space between the tape and the coat, without pulling tight.
For the <strong>neck</strong>: measure at the base of the neck, where a collar would normally sit. For the <strong>chest</strong>: measure at the widest point, just behind the front legs.
If the coat is very thick, measure with the fur compressed, not fluffed up. For growing puppies, repeat the measurement every 3-4 weeks. If in doubt between two sizes, always choose the larger one.
| Size | Neck circumference | Width | Typical breeds |
|---|---|---|---|
| XXXS | from 15 cm | 1.2 cm | Newborn Chihuahua, toy puppies |
| XXS | from 18 cm | 1.5 cm | Chihuahua, Toy Poodle |
| XS | from 24 cm | 1.5 cm | Pomeranian, Yorkshire Terrier, Dachshund |
| S | from 29 cm | 2 cm | Pug, Jack Russell, Standard Dachshund |
| M | from 35 cm | 2 cm | Beagle, Cocker Spaniel, Border Collie |
| L | from 42 cm | 2.5 cm | Labrador, Golden Retriever, German Shepherd |
| XL | from 50 cm | 3 cm | Rottweiler, Great Dane, Mastiff |


Measure your dog's chest circumference at its widest point, just behind the front legs.
If your dog is between two sizes, we always recommend choosing the larger one.
Use a soft tape measure (not rigid), have your dog stand in its normal relaxed position, and always leave about two fingers of space between the tape and the coat, without pulling tight.
For the <strong>neck</strong>: measure at the base of the neck, where a collar would normally sit. For the <strong>chest</strong>: measure at the widest point, just behind the front legs.
If the coat is very thick, measure with the fur compressed, not fluffed up. For growing puppies, repeat the measurement every 3-4 weeks. If in doubt between two sizes, always choose the larger one.
| Size | Chest circumference | Width | Typical breeds |
|---|---|---|---|
| XS | from 31 cm | 2 cm | Pomeranian, Chihuahua, Yorkshire Terrier |
| S | from 39 cm | 2.5 cm | Pug, Dachshund, Jack Russell |
| M | from 48 cm | 2.5 cm | Beagle, Cocker Spaniel, Border Collie |


Measure your dog's chest circumference at its widest point, just behind the front legs.
If your dog is between two sizes, we always recommend choosing the larger one.
Use a soft tape measure (not rigid), have your dog stand in its normal relaxed position, and always leave about two fingers of space between the tape and the coat, without pulling tight.
For the <strong>neck</strong>: measure at the base of the neck, where a collar would normally sit. For the <strong>chest</strong>: measure at the widest point, just behind the front legs.
If the coat is very thick, measure with the fur compressed, not fluffed up. For growing puppies, repeat the measurement every 3-4 weeks. If in doubt between two sizes, always choose the larger one.
| Size | Chest circumference | Width | Typical breeds |
|---|---|---|---|
| L | from 65 cm | 3 cm | Labrador, Golden Retriever, German Shepherd |
| XL | from 80 cm | 3.5 cm | Rottweiler, Great Dane, Neapolitan Mastiff |


Measure your dog's neck circumference with a soft tape measure, leaving space for two fingers between the tape and the neck.
If your dog is between two sizes, we always recommend choosing the larger one.
Use a soft tape measure (not rigid), have your dog stand in its normal relaxed position, and always leave about two fingers of space between the tape and the coat, without pulling tight.
For the <strong>neck</strong>: measure at the base of the neck, where a collar would normally sit. For the <strong>chest</strong>: measure at the widest point, just behind the front legs.
If the coat is very thick, measure with the fur compressed, not fluffed up. For growing puppies, repeat the measurement every 3-4 weeks. If in doubt between two sizes, always choose the larger one.
| Size | Neck circumference | Width | Typical breeds |
|---|---|---|---|
| M | from 45 cm | 2.5 cm | Beagle, Cocker Spaniel, Border Collie |
| L | from 55 cm | 3 cm | Labrador, Golden Retriever, German Shepherd |
| XL | from 60 cm | 3.5 cm | Rottweiler, Great Dane, Neapolitan Mastiff |


Enter your dog's estimated weight to find the recommended leash.
The length (100 or 115 cm) is always your choice: 100 cm for everyday city use, 115 cm for more freedom of movement.
| Weight | Recommended product | Detail |
|---|---|---|
| up to 15 kg | Guinzaglio Slim | 100 cm, one size |
| from 15 to 35 kg | Guinzaglio Strong | 2 cm width, 100 or 115 cm to choose |
| over 35 kg | Guinzaglio Strong | 2.5 cm width, 100 or 115 cm to choose |
Collar
| Size | Neck circumference (from) |
|---|---|
| XXXS | 15 cm |
| XXS | 18 cm |
| XS | 24 cm |
| S | 29 cm |
| M | 35 cm |
| L | 42 cm |
| XL | 50 cm |
Small Harness
| Size | Chest circumference (from) |
|---|---|
| XS | 31 cm |
| S | 39 cm |
| M | 48 cm |
Large Harness
| Size | Chest circumference (from) |
|---|---|
| L | 65 cm |
| XL | 80 cm |
Collar with Handle
| Size | Neck circumference (from) |
|---|---|
| M | 45 cm |
| L | 55 cm |
| XL | 60 cm |
Leash
| Weight | Recommended product | Detail |
|---|---|---|
| up to 15 kg | Guinzaglio Slim | 100 cm, one size |
| from 15 to 35 kg | Guinzaglio Strong | 2 cm width, 100 or 115 cm to choose |
| over 35 kg | Guinzaglio Strong | 2.5 cm width, 100 or 115 cm to choose |


