The amount of shredded meat your chicken will yield depends on its size and how large you shred it, so the amount can vary drastically. Typically, an average, 8-to 10-ounce chicken breast will yield about 1 heaping cup of shredded chicken. For dark meat lovers, an average chicken thigh will yield about 3/4 cup or slightly less shredded chicken. To calculate the amount you need, keep in mind the average serving size of shredded chicken is about 4 ounces per person (but this will vary depending on appetite). If you are making this crock pot chicken for a crowd, I suggest making more than you think you need. Leftovers are never a bad thing, especially since shredded chicken is so easy to store and freeze.