Skip to content

Rat Terrier Size & Dimensions – How Big Are They?

Rat Terriers are considered a small-sized breed of dog.

Rat Terrier Size & Dimensions
Weight:4-8 kilograms (9-18 pounds).
Height:25-30 centimeters (10-12 inches) at the shoulder.
Body Length:30-45 centimeters (12-18 inches) from the tip of the nose to the base of the tail.
Note: Body Length is measured from the base of the tail to the centre of the chest bone & Height is measured from the bottom of the foot to the top of the shoulder (Withers Height)

How Big Are Rat Terriers Compared to Other Breeds?

They belong to the small size category, smaller than medium-sized breeds like Beagles and Cocker Spaniels but larger than very small breeds like Chihuahuas and Pomeranians. Despite their small stature, Rat Terriers possess a muscular build and energetic nature, making them well-suited for various activities such as hunting and agility. Their size allows them to adapt well to indoor living while still possessing enough energy for regular exercise. Overall, Rat Terriers’ compact size makes them convenient for households of all sizes, where they excel as lively and loyal companions.

How Much Variation in Size Is There Amongst Different Rat Terriers?

There can be some variation in size among individual Miniature Long Haired Rat Terriers due to genetic factors and breeding practices, resulting in slight differences in height and weight within the breed standard. To determine if a Miniature Long Haired Rat Terrier is a healthy weight, one should assess their body condition by observing their overall appearance, feeling for easily felt ribs with minimal fat covering, and ensuring a visible waist when viewed from above. Additionally, regular exercise and a balanced diet are essential for maintaining optimal weight and overall health.

When do Rat Terriers Stop Growing?

A Rat Terrier puppy is typically born much smaller than its adult size and will experience the most rapid growth during the first few months of life. The growth rate will start to slow down as the puppy ages, and by the time a Rat Terrier is about 6 to 8 months old, the pace of growth will have decreased significantly. However, this does not mean they are fully grown yet. Rat Terriers generally continue to fill out and add muscle even after they have reached their full height, which contributes to their adult weight and overall size.

A Rat Terrier is usually considered fully grown at about 12 months of age, but some may continue to grow in size and stature up to around 18 months. The time it takes for a Rat Terrier to become fully grown can also be influenced by the size of the dog, with smaller types reaching their full size a bit earlier compared to larger ones. Even when they have reached physical maturity, it’s important to remember that a dog may still mature mentally and emotionally beyond this point.

Can You Predict the Size of Rat Terriers When it is a Puppy?

Predicting the size of a Rat Terrier when it is still a puppy can be done with reasonable accuracy by looking at the pup’s parents and the growth patterns specific to the breed. If the parents are available for observation, their size can give a good indication of the potential size of their offspring. It’s essential to note that there can be variation within a litter, and factors such as diet and health will also play significant roles in a puppy’s eventual size.

What Size Crate For Rat Terriers?

Selecting the correct size crate for a Rat Terrier involves considering both the dog’s full-grown size and its need for space to stand up, turn around, and lie down comfortably. A crate that is too small can be restrictive and uncomfortable, while one that is too large may not provide the sense of security that dogs typically seek in a den-like space. A properly sized crate should allow the dog to move comfortably without excess space.

Essential Items Size Guide for Rat Terrier

ItemSize CategoryMeasurementWhy
CrateSmall61×46 cm (24×18 inches)Provides a cozy and secure space for the dog to rest or travel comfortably.
BedSmall60×50 cm (24×20 inches)Offers a comfortable and snug area for the dog to sleep and relax.
KennelSmall/Medium76×61 cm (30×24 inches)Provides ample shelter and protection while accommodating the dog’s compact size.
CollarSmallAdjustable: 25-35 cm (10-14 inches)Ensures a proper fit and support for controlling and identifying the dog effectively.

Rat Terrier Size & Dimensions – How Big Are They?