The soft middle layer between the top and the backing, which gives a quilt its warmth and its relief. It is not woven, and it is sold off a roll in a few standard widths.
The edge finished with strips cut at 45 degrees to the weave, which stretch enough to follow a curve or a scallop. Cut as one spiral from a single square, it gives a long length with almost no joins.
The small squares set where two sashing strips cross. They keep the rows lined up, and they let a second fabric turn up at every junction.
Each patch is tacked around a paper shape, then the shapes are joined edge to edge by hand and the papers come out at the end. It is how hexagon quilts are made.
The width of the fabric as it comes off the bolt, selvages included. Patchwork counts the usable width, once the selvages are cut away.
A quarter of a yard cut the wide way, about 18 by 22 inches instead of a long narrow strip. The same amount of fabric, in a shape you can actually cut blocks from.
The finished size is the piece as it looks once it is sewn in; the cut size is that plus a seam allowance all round. This app always says which of the two a number is.
The direction of the woven threads: along the selvage the fabric hardly stretches, across it gives a little, and at 45 degrees it stretches most. Cutting with the grain in mind is what keeps a piece from going out of shape.
A corner where the two strips meet on a 45 degree seam, like a picture frame. The other way is butted, where one strip simply runs past the end of the other.
The pieced front of the quilt, finished but before the batting and the backing are added. A size given here as a top size is the front alone, with no overhang.
Strips of fabric sewn between the blocks, so each one is framed instead of running into its neighbours. They also make the quilt bigger without piecing any more blocks.
The fabric between the stitching line and the raw edge, folded away inside the seam. Patchwork works at a quarter of an inch, and every cut size this app gives you already includes it.
Blocks turned by 45 degrees, so they read as diamonds rather than squares. The same block looks quite different, and the quilt finishes larger for the same number of blocks.
The triangles that fill the sawtooth edge left when blocks are set on point. They are cut oversized on purpose and trimmed straight once the top is assembled.
The edge finished with strips cut across the width of the fabric and joined end to end. It costs less fabric than true bias, and it will not go round a curve.