It is a French Bike.
People talk about a French Fit

It is my opinion that if you can sit on the seat and your feet touch the pedals, then you can ride it. It is also good to be able to get off of the seat and straddle the bike, but you don't need much clearance. Tight is just fine.

There may be a "racing" stance which is facilitated by a smaller bike, but it isn't necessary for a casual rider.

How old are you? Under 20? Over 20? Over 50?

The bike is free, right? That is always the best price