oneygirl

No I didn't prewash the fabric.

watson's mom

I prewash every fabric I sew with and I still have this problem also. I am going to do a test block tomorrow making it 1/8th bigger all around to allow for the fabric taken up by the pressed seam. Maybe this will work. Probably not, but I am going to try anyway.

barbrdunn

How much short of 12 1/2 is it exactly?

Jim's Gem

Beautiful block!

EasyPeezy

Sew 3 strips of fabric 1.5 inch wide, press and measure the centre strip.
It should be 1". If not, adjust your needle position slightly to the left or
to the right until you get the 1". Every fabric is different and needs to
be tested. Same if you use a different thread.

nativetexan

hmmm,.maybe pressing your seams to the outer edges of the blk would help a bit.

Boscobd

Oh, how pretty! The colors are great.

Ditter43

I like the block....beautiful fabric choice! There are 101 reasons why blocks are a little off! Choose one! :D

Mariposa

Pretty block! Love the colors! A scant 1/4" seam will probably help. Best to you!

earthwalker

Lovely block and fabric. I'm with Ditter..the reasons are legion. I try and do a practice block first using remnants...saves dramas with using the fabric set aside for your project.