Made once once.. measure across from pole to pole, add around 1-2 in. for give (I have a heavy dog if there isn't enough give things will just rip out), measure around the circumference of the pole, add around 1 1/2-2 in. (1 in. double folded for the sleeve seam and 1/2-1 in. for "give") Don't forget to run double seams - side by side - for strength. Once I got things kind of where I wanted them I cut out the corners so you could slide the poles through and then bound the raw edges (before you make the sleeves) make the sleeves and done. May not be perfect but it held the dog.