* Sex: Male reindeer are generally larger than females.
* Age: Young reindeer are smaller than adults.
* Breed: Different subspecies of reindeer may have different sizes.
* Geographic location: Reindeer living in colder climates tend to be larger than those in warmer regions.
* Time of year: Reindeer lose weight during the winter months and gain weight in the summer.
On average, adult male reindeer weigh between 150 and 300 kg (330 and 660 lbs). Adult female reindeer weigh between 90 and 150 kg (200 and 330 lbs).
Note: These are just average ranges, and individual reindeer can be significantly larger or smaller.