My original ones measure 0.248 from flat to flat and 0.263-0.267 from point to point.
The ones from ECS measured 0.224 from flat to flat and 0.241 from point to point.
The ones I got from cuda junction are 0.238-0.241 and 0.258-0.259 from point to point.

For reference the original ones are off a 10-24-1968 built car.