I am making the Rail Fence pattern and I was cutting the three strips 6 x 6 1/2. Somehow I cut two strips 6 x 6. Now what do I do with the 12 blocks that are 6x6. Any suggestions.

Easy thing would be to make ALL blocks 6x6.
Just trim the ones bigger down to that size.
OR... make those 12 blocks over again and save the
smaller ones for another day.

matching pillow covers!
Walhanging, table runner...
Or add them to the backing!

All sorts of stuff to do.

Tablerunner.

If you're doing rail fence, the rail blocks together should be square, all 6x6 or 6-1/2x6-1/2 or 7x7 or 10x10 ..... whatever size you want.

Otherwise, they won't go together.

Make a nice table runner

ditto

As QuiltE and QuiltnNan pointed out, your blocks need to be square, so if you really did cut some of them 6 x 6 1/2, you need to fix those blocks to be 6x6 and they will then match the ones you "accidentally" made 6x6.

THANK YOU so very much You all have made my day.... Love the ideas think I will just cut the 6 x 6/12 to be 6 x 6. I had thought of using them on the back but the table runner sounds even better. But I think I will stick to the 6 x 6. You are all sweethearts love you all and GOD Bless

If you have enough fabric to use for the original quilt, without using these blocks, make a 45 x 60 lap quilt out of the smaller blocks, adding whatever other fabric you have on-hand to fill in, use baby quilt-size batting, maybe even tack (tie-off) instead of quilting to finish it quickly. You'll probably get more use out of it than from the original quilt.