I'm not sure what they mean by "sheerness", this is not pantyhose, so I only gave it a 4, (in case its actually delightfully "sheer"), but setting that aside...look for the circular decorative sound hole rings on your acoustic guitar, match the curve, pencil that, peel the adhesive, stick that puppy on and forget about it. The first time I got one of these, I wanted to place it at a certain spot, so I wound up custom cutting the curve with an exacto knife, did a less than stellar job, and wound up struggling to peel that one off, where second time around, I just used existing curves to match. My Washburn had no pickguard, so anything would be an improvement, and quite frankly, its a standard enough design you probably won't need to go all fancy on it. Looks fine.