Tracking down the perfect frame can be difficult if the picture or poster you're looking to display has unusual dimensions. Even if you do find one, it might not be suitable for your house or apartment, due to weight or construction. If you're feeling crafty, there's nothing to stop you from making your own.
Photo by nadiaattack
Instructables user "nadiaattack" has all the steps you need to follow to build a foamcore frame, including painting it to give it a fake wood appearance.
The materials are straightforward -- foamcore sheets, a craft knife, ruler and / or measuring tape and glue.
The key to this frame is that it's made from foamcore, which is essentially foam sandwiched between to pieces of thin cardboard. This means the frame will be lightweight and, if made correctly, sturdy as well. Cutting it requires patience, as you can't just carve it like a steak -- this often results in compression of the foam, leaving an unsightly depression along the cut edge.
The best way to cut foamcore is to make a light incision to pierce the top cardboard layer, followed by a second, deeper cut to get through the foam, finished with another gentle cut to disconnect the bottom cardboard layer.
You'll also want to keep the knife sharp, as foamcore tends to dull blades quickly. Most craft knives have snap-off blades, so this shouldn't be an issue.
For the full steps, hit up the Intructables link below.
Faux Wood Foamcore Frame [Instructables]