Originally Posted by Rosyhf

Some things can happen if...a piece is cut on the cross grain (it will stretch a bit..use a scan 1/4inch (two or three threads over). Cut precisely. Make sure the fabric is straight before cutting.

I know you have been taught to fold the fabric and cut accross the grain. For instance: lets take a log cabin. you cut accross the grain and you start sewing your strips together. Your block, if you notice is warped or not perfectly square. That is because the cross grain is weak. Now cut your stips on the lenght of grain. Your block will be perfectly square and will be the correct size.

Your borders should also be cut on the straight of grain. Before applying your borders, measure from the middle of you quilt from side to side and use that measurement.

For beginners, I recommend the four Books and rulers from Sharon Hultgren. Her rulers will cut perfect triangles, hex, diamonds. Any pattern you find, you can use her rulers to make sure that the patches are perfect.