How many coasters should I make for an event?

A reliable rule of thumb is one coaster per guest, plus a 10 to 15 percent cushion for spares, replacements, and guests who want to keep one as a memento. Rounding up is smart, since a small top-up run later usually costs more per piece than including extras up front.

For bars, weddings, and multi-day events where coasters get swapped often, lean toward the higher end of the range.