They're 165, which I guess corresponds to the theory that shorter cranks are desirable on a single speed because of the higher cadence. At the moment the pedals are quite stubbornly stuck in the cranks, which I guess corresponds to the frequent need to mash with a single speed.

The ad for this bike showed the cranks as the first photo. It was an effective strategy, because I clicked through based on the premise that any bike with this crank would be pretty decent quality.