If you have an old collection of pins and want a way to display them, think about using a shadowbox. A shadowbox is a picture frame that has depth to it. The depth of the frame allows you to frame three-dimensional objects. A shadowbox will keep your pins nicely displayed while protecting them from the elements and loss. This is an easy and fairly inexpensive craft project.
Arrange the pins that you want to put in the shadowbox however you desire. This works for antique broche type pins or button pins, such as from old elections. Measure the length and width of your arrangement to see what size you need the shadowbox to be.
Remove the back from the shadow box. Cut a piece of felt or velvet the same size as the backing.
Fasten the pins to the fabric in the desired arrangement. Make sure the pins attach to the fabric without puckering it. Catch less fabric in the pins if the fabric puckers.
Stick double-sided tape on the back of the fabric. Put one piece at each corner and one in the middle of each side. Affix the fabric to the backing of the shadowbox.
Replace the pieces of the shadowbox and hang up on the wall or display on a shelf or table.
Dress up the inside of the shadowbox with ribbon along the edges of the fabric. This works especially well if the shadowbox you bought is a little larger than you needed. It takes up space at the sides of the shadowbox. Make sure to use ribbon that goes with the theme of the pins.
Make your own shadowbox if you have talent in woodworking. Use Plexiglas and molding to create the front see-through part of the box. Add a hinge to the front piece to make a door for the shadowbox. Paint or stain the shadowbox to match the décor of the room.