You know, measure twice, cut once...
My biggest "duh" moment was when I made my late husband a pair of shorts. Must have been asleep at the wheel when I took his measurements. They were grey with white trim. No zipper, just slip on with elastic waistband. He liked them a lot & said they were very comfortable. He immediately wore them for a few days before I had a good look at them. When I did get a good look, I saw I made the legs too short & WIDE. When he'd sit or move in certain ways, anyone who was looking saw "the boys" peeking out & he wasn't aware. Needless to say, he never asked me to make him another pair of shorts! We laughed about this for years!