How Big Will My Chihuahua Be?
 

By the American Kennel Club’s breed standards, Chihuahuas stand at 5 to 8 inches tall and weigh no more than 6 pounds. However, these are the show ring requirements, and many Chihuahuas can grow up heavier. 

Although genetics can be tricky and we can never exactly predict how big a puppy will get, Chihuahuas will always be small dogs.
 

Are There Different Sizes of Chihuahuas?

Although the AKC states that Chihuahuas with the ‘apple head’ exhibit the breed hallmark, you might also come across a Deer Head Chihuahua. Not only do they have slightly different facial features, but Deer Head Chihuahuas also tend to be larger than the competing Apple Head Chihuahua. 

There’s no such thing as separate Teacup Chihuahua or Toy Chihuahua size. Most commonly, when people refer to Chihuahuas as Mini, Teacup, or Toy, they just mean the regular Chihuahua who is smaller-sized.
 

Chihuahua Size Charts & Growth Patterns – Month Wise

Regardless of their size, all puppies follow similar growth patterns. Generally, dogs reach adulthood around their first birthday. Smaller-sized breeds will reach their full-grown size around 8-12 months, larger pups might take up to two to three years to reach their adult size. Based on that, we can expect Chihuahuas to finish growing around 9 to 12 months old. Growth plates close around 10-11 months old.

Around the time your puppy turns 6 months old, they will now most likely start to resemble a full-grown dog. By then, Chihuahuas have reached most of their adult height and weight. Even after your puppy has reached their full height, they will continue to gain some more weight and fill out their chest. However, in the final months, their growth and weight gain won’t be as noticeable anymore. 
 

Does it matter how big the puppy’s parents are?

The size of the puppies parents is not indicative of the puppies weight at maturity. 
 

Because of genetics 6 pound parents are able to have puppies that weigh 2 pounds full grown and 4 pound parents can have a puppy that weights 6 pounds or more. Chihuahuas generally range in size from 6 to 9 inches tall at the shoulder and weight anywhere from 2 to 6 pounds.

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Using the below weight prediction chart is not a guarantee of expected adult size.  Over the years I have found this chart to be about 75% accurate with size varying up or down from the below chart within a pound.