A small wedding is not necessarily one to which very few people are invited. It is one to which the person you are addressing is not invited.

Judith Martin (b. 1938) American author, journalist, etiquette expert [a.k.a. Miss Manners]

“Miss Manners,” syndicated column (1991-09-08)
    (Source)

Collected in Miss Manners on Painfully Proper Weddings (1995) (also titled in later editions, Miss Manners on Weddings and Miss Manners' Guide to a Surprisingly Dignified Wedding).