Bristol Novelty BH571 Cap Hat and Hair Golfer Style, Mens, White & Blonde, One Size

What is the maximum head circumference of this

Would this fit an 8 year old or is it an obvious adult size?

Ok so 1 says it only fits a 5 year old and the other says 1 star but loved it? Is it for kids or will it fit the averabe bloke's head?!

Is the hair sown onto the cap?