When shrinking a cap wig, what size block is recommended for optimal results?

When shrinking a cap wig, using a block that is one size smaller than the wig's circumference allows for optimal tension and fit while reshaping the wig. A smaller block provides the necessary support to effectively pull the wig's cap tighter and create a snugger fit on the wearer's head. This technique is essential in ensuring that the wig maintains its desired shape and size after the shrinking process.

If the block is the same size or larger than the wig's circumference, it would not provide the correct amount of tension needed for effective reshaping, potentially leading to a loose or ill-fitting wig. Therefore, selecting a block that is one size smaller is the best practice for achieving the desired result in wig fitting.