David needs to attach his boutonniere to his lapel. What length is the black headed pin he should use?

The appropriate length of the black-headed pin for attaching a boutonniere to a lapel is crucial for ensuring it holds securely while remaining discreet. The 1 1/2 inch pin strikes the right balance; it is long enough to penetrate through the thickness of the flower stem and securely attach to the fabric of the lapel without being excessively long. This allows the boutonniere to sit flush against the suit or jacket, enhancing the overall appearance without causing any discomfort or damage.

A pin that is 1 inch may not provide sufficient length to ensure a stable hold, especially if the stem of the flower is thicker or if there is additional fabric to penetrate. A 2-inch pin might be too long, which could go through the lapel and become visible on the inner side, detracting from the neat appearance desired. Similarly, a 2 1/2 inch pin risks being overly cumbersome and could potentially create a hazard, as it might protrude too far and not fit well against the lapel. Thus, the 1 1/2 inch pin is the best choice for attaching a boutonniere effectively and elegantly.