Any size, and the size is not what is marked. What is marked is whether you can say who waits longer afterwards. Hire three people and the answer might be the people funding it. Move a sign and the answer might be nobody, in which case say that and show your working. A redesign that helps everybody has not been looked at hard enough.
Ravi SundaramWeek 11, 19 May 2027
Mine is a sign. Just a sign. It moves about four minutes of perceived wait and costs nine dollars.