Poodles are classified into four size categories: Toy, Miniature, Moyen (also called Klein or Medium), and Standard. Here are the size ranges for each category:

Toy Poodle: Toy Poodles are the smallest size category and typically weigh less than 6 pounds. They stand up to 10 inches tall at the shoulder.

Miniature Poodle: Miniature Poodles are a bit larger than Toy Poodles, standing between 10 and 15 inches tall at the shoulder. They typically weigh between 10 and 15 pounds.

Moyen/Klein Poodle: This size category is not officially recognized by the AKC, but some breeders use it to refer to Poodles that are larger than Miniature Poodles but smaller than Standard Poodles. Moyen Poodles stand between 15 and 20 inches tall at the shoulder and weigh between 20 and 35 pounds.

Standard Poodle: Standard Poodles are the largest size category and typically stand over 15 inches tall at the shoulder. They weigh between 45 to 70 pounds.

It's worth noting that there can be some overlap in size between the smaller end of one category and the larger end of another. It's also possible for individual dogs to fall outside of these size ranges.