I recently bought these three small metal frames - no pictures inside, not very inspiring and easily passed by - not by me though!
Also in my possession, a set of notecards depicting Victorian ladies, squirreled away for the right moment.
With the addition of some vintage lace, they have now become something more desirable.
Sometimes a frame is needed but it's not about the frame, the pictures are quite fussy and didn't need much, the lace just softens the effect. I think they look rather fine.