Thousands of people participate each year. And organisers aren't sure that is a good thing.
This year, they decided that overweight volunteers should not participate in the televised "guard of honour."
Notes leaked from a meeting and translated by the Guardian read, in part: "A number of members of the guard of honour are starting to get a substantial stature, at least for this function. . . . There are regularly comments and complaints about it. In order to prevent this, we will have to give people with too strong a stature a different task."
Organisers blamed the decision on optics, saying participants' uniforms "did not look good" on heavier volunteers, because of "bursting buttons," according to the Guardian.
One longtime participant, Bas Jongeneel (who described himself as someone with a "strong build"), told local reporters that he had been assigned to the catering team this year, after several years as a marcher.
His wife, Francisca Roeten, complained about the decision. "You cannot discriminate in the Netherlands, but an association that commemorates our war heroes hides away people with a bigger belly, in their eyes," she told local broadcasters.
Others also complained of discrimination.
The blowback has gotten so bad that Vincent van Gaal, chairman of the Erepeloton Waalsdorp organisation, which runs the event, has promised to repeal the decision.
"We are the last to exclude people, and traditionally we want our guard of honor to be a reflection of society," he said, according to the Guardian.