Shank

To improve the line of your arch and provide better weight distribution, three-quarter or even half-shank your shoes (practice on an old pair first).

Then, stitch one long ribbon in a U-shaped pattern (secure under the drawstring casing on one side, continue under the arch and up the other side).  That helps pull the shoe towards your arch so that it’s more flattering.”
Source: Mary Carpenter for Pointe Magazine

improve arch support in pointe shoes

Trimming the shank in your pointe shoe is important because it helps you control where your pointe shoe breaks.

To do this, all you need to do is pull back the fabric around the shank so that is it exposed and trim it to where your arch is the deepest. You'll also want to make sure to shave the end of the shank down so it is smooth. When you're done, you'll have a shank that conforms to your foot better and looks better on your foot!

pretty pointe shoes

Source: www.showstopper.vip