Instructions
Examine the left ear of the bear for a brown button. The brown button is a Steiff trademark. If there is no button, it is unlikely to be Steiff. The only way Steiff bears with no buttons are from 1902 to 1904.
Examine the ears and chest for a tag. Depending on when the bear was made it might have an ear or chest tag. The tag should say "Made in Germany."
Look at the seams. The front of a Steiff bear has handsewn seams. Handsewn seams will look small yet not completely perfect with a slight puckering.
Examine the limbs and paws of the bear. Steiff bears have limbs the length of the bear's torso or slightly longer, and paws with a slight spoon shape.
Run your fingers against the fur. The fur should feel super soft since real Steiff's are made of woven fur, mohair or other materials. It should not feel like the synthetic fur of most stuffed animals.