This bone casing tape can be used in two different applications, one for boning a straight-fronted corset and the other for making an elliptical cage crinoline. It fits 1/2" hoop steel snugly, but isn't quite wide enough for two 1/4" bones side by side--wider tape would be needed to accommodate two bones and a line of stitching down the middle. I love this tape for how easy it is to use and how incredibly sturdy it is!