That sounds about right.
I bought a Sears 30 ft. tape measure years back. I used it for a few years before I noticed a problem. When measuring, I think 27 1/2", the larger 1/2" mark was at 5/8". I did a double take and gave it to my son so he could see it. I carried it back to Sears. Since I didn't have the receipt I got a replacement. It was the same.