Summarize this article:

Making your own flower press doesn’t take a long time and gives you a designated press so you won’t have to scrounge around trying to find heavy books or bricks. Each piece of wood should be 1 to 2 inches (2.5 to 5.1 cm) thick. You can use plywood or other scraps of wood.  If you visit your local home improvement store, you may be able to find scraps of wood for sale that can be used for your press. If you are cutting your own pieces of wood, you can make your press any shape or size that you want. Some people prefer round presses, while some want a smaller or bigger press, depending on how many flowers they need to dry at one time. A 9 by 12 in (23 by 30 cm) press can hold anywhere from 10-20 blooms, just depending on what kinds of flowers you are pressing. With c-clamps, one side of the clamp stays stationary and the other side can be adjusted by turning the handle to move the screw up or down. Open each clamp wide enough to fit the pieces of wood. Start by positioning one clamp over a corner of the press. Adjust the screw mechanism to bring the sides of the clamp together as tight as possible. Repeat this with the other 3 clamps.  Visit your local home improvement store or shop online for your c-clamps. You don’t need to get anything fancy, so you should be able to find these clamps for about $5 a piece. If you bought a wooden press rather than making one yourself, there should be bolts for you to utilize rather than having to use clamps. Resist undoing the press and checking on your flowers until at least 3 weeks have passed. If you do, it could disturb the flowers and make it hard to get them back into the same position so that they dry perfectly. To be safe, wait 30 days before opening the clamps and removing the flowers.  If you have more flowers you want to press in the meantime, use a second press or one of the other pressing methods so you don’t disturb the ones that are in process. This is one of the more time-intensive methods because it doesn’t use much weight or heat to press the flowers. If you want to speed up the pressing time, add a few bricks or books on top of the wood.

Summary:
Buy or cut two 9 by 12 in (23 by 30 cm) pieces of wood. Secure each corner of the press together with a c-clamp. Let the flowers dry for about 30 days.