I ordered the 36 inch cover and it fit my 35 in wide fire pit perfectly. It has 2 drawstrings at the bottom that allow you to adjust for the bottom width. For the price, it seems to be very well made. I live near Lake Michigan and do have 25 -30 MPH wind gusts periodically through out the fall and winter. So far, it isn't moving. The material feels very heavy weight. So far, loving it!!