Full pack is 79g divide that by 4 roughly 20g each at 103 calories an I right?

That sounds right to me Jess (yum I do love those)

Reeses Peanut Butter Cups, all varieties (2-cup pack) 12
Reeses Peanut Butter Cups, all varieties (3-cup pack) 14
Reeses Peanut Butter Cups, all varieties (1 miniature) 2½
Reeses Peanut Butter Cups, all varieties (1 big) 10½
Reeses Peanut Butter Cups, all varieties (1 snack size) 4