The measurements are exact and fit my window perfectly. As for being a blackout curtain I purchased the white and they dont blackout the light at all but since they are for my living room that is not a deal breaker. As long as my neighbors can't see in my windows thats all that matters. I was a bit disappointed in the material cause looking at the picture they looked to be a soft velour or suede looking material but in person they look to be polyester. 

When I recieved them I washed them right away and hung them on the curtain rod to dry because they were slightly wrinkled. After this the wrinkles were gone. The only thing I really don't like is that for some reason these curtains yellow in the creases however when thrown in the washer it washes out. Next time I purchase curtains like these I will definitely buy darker colors.