I also cannot find a size in them so please go by the measurements.
These are in good condition for the age and could be used as is however if you are a serious skater or want to be they could probably use some work on the wheels and new stoppers.
Other wise they are great.
They measure... about 10.25 inches long along the inside of the foot bed and a little over 3.5 inch ball.
these are some fabulous vintage skates!