The “selvage” is the lengthwise finished edges of a woven
fabric. One of the selvages is frequently white, with the name of
the fabric, designer, and manufacturer stamped onto it. The
opposite selvage is also a woven edge but includes the fabric
design. These edges should be removed and not included in piecing
as they are woven more tightly and shrink differently than the rest
of the fabric. The width of the fabric between the selvage edges is
usually 44″ or 54″, depending on the fabric manufacturer.
One popular trend in quilting is to cut the printed selvage edge
from the length of the fabric and use it in “string” block
patterns, creating colorful patterns that include the text and
color test dots from the printed selvage edges