Place a flexible measuring tape over the top of your pin cushion base, creating a dome that’s the same size as you’d like your cushion to be. A good rise is about 1 inch higher than the edge of the base. Then take note of the measurement of the dome, from one side of the base to the other.
Add 2 inches to this number and cut a square out of your fabric, using that width dimension. For example, if your desired dome measurement is 5 inches across, add 2 inches and then cut a square that is 7 x 7 inches.
Round off each of your corners, creating a circular shape. It doesn’t have to be perfect.
Add a short line of hot glue along the inner edge of your cushion base, near the top edge.
Place one edge of your circle onto this glue, allowing 1 inch of the fabric to drop below the rim of the base. Be sure that the right side of the fabric is facing up.
Glue the opposite edge of your fabric circle to the opposite inside edge of your base, allowing the edge to drop 1 inch below the rim.
Grab one of the sections of fabric that’s still outside of the base and add some glue to the fabric, about halfway between the sections that are already glued down. Make a line of glue that’s about 3/4 inch from the circle’s edge.
Tuck this fabric inside of the top edge of the base, pressing it firmly against the inside of the base. Don’t worry about the edges looking smooth and perfectly tucked in yet.
Stuff polyester fiberfill into the dome of fabric, through the remaining side that hasn’t been glued shut yet. Stuff it with enough fiberfill to help it start to take shape.
Begin evening out the sides that you’ve already glued, adding more glue to the gaps. Try to create a smooth domed look, gluing down the fabric evenly all the way around. Stuffing more fiberfill in a little at a time can help push out the fabric more, showing you where you may need to glue your fabric a little better. It also helps to use your fingers to pull away the fabric a bit from the base, making more room to add glue to the inside edge of the base.
Stuff more fiberfill under the fabric until your dome is nice and firm, and your fabric is taut. Use your fingers to tuck the remaining fabric inside of the base, and then add a line of glue to the inner edge of the base. Press the fabric against the glue.
Add glue where needed around the base, to create an even and rounded dome shape.
This tutorial is excerpted with permission from <a href="http://amzn.to/1oDHYlz">"No-Sew Love: Fifty Fun Projects to Make Without a Needle and Thread"</a>by Ashley Johnston and published by Running Press.