I made one of these, my tip is to put the t-shirt on and have some one measure and mark a cut line on the t-shirt all the way around. I'm busty, and I just cut the t-shirt off where I thought I wanted it. It looks good until I put it on. The front of the t-shirt doesn't look right because the seam is higher than the sides and back. Add that extra length in front if you are busty. Kind of like if you have a big bottom, the back of the skirt will be higher. I am short and thin so one yard of fabric attached to the t-shirt was long enough for me to go just to my ankle. Width of fabric went around hips and I have plenty of ease.