What is the value of a large 1913 buffalo nickel?

It's very likely your coin is a novelty or gift item. All genuine buffalo nickels are the same size, weight, and composition as modern Jefferson nickels.

A number of companies make replicas of famous-date American coins but they're either much larger or smaller than their real counterparts to prevent them from being considered as counterfeits. Some are large enough (~100 mm) to be used as coasters!