What stride length do I need on an elliptical?

Specialist communities like r/Fitness consistently flag stride length as the single biggest comfort factor. Users under about 5'6" can often tolerate a 15-16 inch stride, but anyone taller generally wants 18 inches or more, and runners or users over 6 feet are usually happier with a 20-inch stride. Several Amazon ellipticals advertise '20-inch stride' but high-trust reviewers note the effective stride can feel shorter than the spec implies.