Measure the diameter of the LP. They typically come in either 10- or 12-inch sizes. If you have a 10-inch LP, you will need a 10-by-10-inch frame. With 12-inch LPs, you need a 12-by-12-inch one.
Lay the frame flat on a solid surface, and then remove the back cardboard. More than likely, a paper image is placed underneath the cardboard against the glass. You won't need it.
Place the LP into the frame and place the cardboard back over the LP.
Select a position on the wall where you want to display your LP. Hammer in a nail at that spot. Find the loop on the back of the LP frame and hang the frame over the nail in the wall.
Adjust the frame into it is up straight on the wall. Step back to inspect it and make sure it isn't crooked.