Under normal circumstances, hamsters will grow to about 8-12cm and weigh about 30-40g. How big a hamster can grow is mainly related to the breed. For example, golden hamsters generally grow to 12-20cm, Gakalia hamsters generally grow to 7-12cm, Campbell hamsters generally grow to 7-12cm, Robrov Ski hamsters generally grow to 4-5cm.

In addition to the breed, the size of the hamster is also inseparable from the owner's feeding method. The feeding method of the hamster is as follows:

1. Hamsters mainly eat rat food, but they can also eat an appropriate amount. Feed some peanuts, melon seeds, walnuts, vegetable leaves, carrots, apples and other foods.

2. Environment: Provide a comfortable and hygienic environment for hamsters. A comfortable and hygienic environment can make them healthier. Healthy hamsters will naturally live longer.

3. Injuries and injuries: Injury or illness may shorten the lifespan of a Japanese hamster, so if a Japanese hamster is injured or sick, the owner should take medication and seek medical treatment in time.