Smock & Block Guide for Bishop Dress & Blouse Necklines by Ellen McCarn. This handy tool has neckline measurements laid out on a heavy pellon to use for blocking your bishop or ensuring your latest creation has the correct neck opening. Includes neck sizes for preemie/newborns up to adult necklines. It also a blocking guide for inserts AND has a scallop tracing guide for hems and collars. The size of the scallops measure from 1" to 4". The Smock & Block is stretch resistant, can be pinned or basted to and cleaned, if necessary, without shrinkage.