There are a few points to consider when coming up with the number of guests to be invited.
1) Type of wedding: Do both of you want a large gathering or a small intimate celebration.
2)Budget: How much money do you really want to spend on your wedding. Would you like a small gathering and have it be an elegant sit-down/black-tie dinner, or invite more people and have it be less elaborate.
3) Location: If you have a certain spot you wish to have your wedding, it may or may not be able to accommodate the number of wedding guests you are considering.
Fact: For the most part, the guest list usually is comprised of half the bride’s side and half the groom’s. Within that about 20-25% of invited guests being unable to attend.