How can I fix a tiny gap in a miter joint on a wooden frame?

[Dennis_L]

I've been trying to make a simple wooden picture frame, but my miter joints keep coming out with a tiny gap on the inside corner no matter how carefully I measure and cut. I'm using a basic miter box and a hand saw, and I just can't seem to get that perfect 45-degree angle to fit together tightly. Is there something obvious I'm missing in my technique?

[Zoey_T]

I used to get tiny gaps too and it drove me nuts until I realized the wood moved as it dried and the frame flexed. Humidity might be changing the thickness after you nail or glue.

[Riley.R]

I tried clamping and even heating a bit to seat it, but the gap still showed up.

[Sophia.R]

Maybe the problem isn t the cut but how you join the corners afterwards. My joints looked right but the inner corner never closed.

[AddisonJC]

Saw drift can creep in and ruin a forty five degree cut the blade tends to wander a bit if the box is loose or the work is slippery.

[JeffreyJ]

That tiny gap can be so visible when light hits it I know the feeling and often I end up just filling with wood putty and pretending it is part of the frame.

[RileyFJ]

Do you ever wonder if the real issue is something else like the frame being a bit too small for the other parts and it pulls apart as you try to assemble?

[Thomas_H]

I drifted off to listen to a neighbor and came back to the frame and it still felt off and that little moment of distraction made me rethink the setup.