The men’s buttonholes should be on the left side- easy to remember as it is closest to the heart. It helps the flower stay looking it’s best all day as most people lean in to hug people from the right, the handkerchief should also be on this side.
To attach the buttonhole position it 10cm down from your left shoulder and pin from the underside of the lapel down through the stem and back out to keep the pin hidden and the flower secure. Alternatively if you have a wedding co-ordinator ask them to do it for all the groomsmen!
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