I had an old frame lying around the house. It was missing glass and any hardware, and I’d painted it and put it in various places around my house. So I made an earring holder!
I knit until it was about as long as the frame opening, then I bound off and attached the lace to the frame via staple gun. A helpful hint – staple gun the center of each side, then work around equally – that way you don’t end up with your lace cockeyed inside your frame.
You could use any lace pattern, and size frame, and any size yarn! Definitely do a gauge check so you don’t end up with a lace piece way too big or too small for your frame. (Too big wouldn’t be as bad as too small, though.)