Added Nov 13, 2010
San Francisco Ba...
Patterns will usually tell you which pattern pieces also need to be cut out of interfacing. Traditional instructions will tell you to cut the interfacing 1/4" smaller on all sides than the fabric so that the interfacing will not go too much into the seam allowance. Most modern interfacing is light enough that this does not matter. If you have lots of interfacing pieces to cut out, it may make more sense to fuse your fabric to the interfacing first, and then cut, although this may be more wasteful.