That's about 17 percent shorter than "long" 175mm cranks. People's leg length varies a lot more than that.150? Thems some short cranks.
I have cranks on my bikes from 127mm (for my adult sized Big Wheel) to 225mm (for my high bottom bracket MTB). Most of my regular bikes have 185mm or 190mm cranks, but others are as short as 165mm. The shorties spin faster with less effort, the long ones push bigger gears with less effort.
Why the industry has decided that every adult of every size should have 170mm to 175mm cranks (3% difference) is pretty mystifying to me. But one thing I've learned by trying different length cranks is that too short is easier to work with than too long.