Semi-formal wedding attire is a dress code that falls between cocktail attire and black tie optional. It is a slightly toned-down, business-esque version of cocktail attire, where shorter dress hemlines (think midi-length and high-low skirts) and suits are both appropriate. Here are some guidelines for both men and women:

For Men:

• A suit and tie is the most formal attire you will choose, and even then, you will want to relax the overall look of your suit a little, without getting too casual.
• Dress pants or khakis paired with a blazer or suit jacket and tie are also appropriate.

For Women:

• A cocktail dress, dressy jumpsuits, rompers, and separates are all appropriate semi-formal wedding attire options.
• Dress hemlines should be shorter, such as midi-length and high-low skirts.

It is important to note that even though semi-formal is interchangeable with "dressy casual," it is not recommended to wear jeans for any type of wedding, even the most casual ones, unless the couple explicitly allows denim.