Accessories I usually skip: Anything that looks futuristic, super sporty, or too school outfit. Even if its cute, it breaks the illusion
Add a roomy corduroy jacket, a check shirt, and some loose trousers, and you've basically got the blueprint for every indie menswear moodboard on the internet
For a semi-formal day time event, a suit (three-piece suit, double-breasted suit, etc) is a better choice than a tuxedo and your appearance should be over the top, a dark suit or dressy suit is a good option
GWS Pro Tip: While this isnt mandatory, the garden party attire dress code often takes inspo from whimsical and vintage-inspired aesthetics, such as regencycore and cottagecore
You do not want the product you have received (but you must return the item and the item must be unused)
Pay attention to collars, cuffs, and details