here are a few ideas to help you solve that dilemma:
custom framing can cost a small fortune but is worth the occasional splurge.
even though i am a big believer in custom framing, there are MANY times when the money in my budget or clients budget needs to be spent elsewhere.
one of my favorite tricks is to use an inexpensive, store bought frame (ikea ribba frames are a favorite of mine!), and have a mat custom cut to fit my art.
one very simple solution is to place the art work directly on a piece of canson paper (available in the art section of any craft paper) or mat board. this works best when there is minimal contrast between the art and the background.
trim to fit your frame
have a inexpensive poster or print that doesn't fit any frame? consider cutting it! the trimmed piece will seem transformed with its new shape that you will most likely just find more appealing that the original! (can you tell i have bison on the brain? the print in the background here is the same one is used in grady's bathroom.)
floating your art between two pieces of glass helps the eye to focus on the art, and any uneven space between the art and the edge of the frame becomes less obvious. this is a budget friendly option, as it requires no mat or paper to mount the art on.
do you have another way to inexpensively frame art? leave a comment--i would love to hear!