identical — frames that are similar in overall size and profile but slightly different in molding detail or finish can actually create a more interesting result once they are all painted or stained the same color. Look for solid wood construction rather than thin MDF or plastic frames, since the wood needs to have enough thickness and strength at the corners to accept a joining connection without splitting.
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Avoid frames whose corners are already separating or whose wood feels soft and punky, since these will not hold together reliably
