The end of the long corner from the bridge side of the soundhole measures 3 inches out to the side. From the bottom of the soundhole, it is 4 inches down. The pickguard goes from exactly where the G string is, 6 inches to the corner where those two other points meet.
The front end of the pick guard will cover most other pick guards. It is meant to fit a 4 inch soundhole with a 1/2 inch set back for the rosette.
The back has an adhesive backing, which peals away for easy installation.
**As this is a general replacement product, it may need modification to fit your specific guitar.