flounce (and billions of other tutorials at 365 sewing) the illustration of how different shapes fall
Bridal Loops / Rouleau Loops and Fabric Covered Buttons / Bridal Buttons in Crafts, Sewing & Fabric, Sewing
collar shapes and their patterns
Button Loops Tutorial from Threads Magazine
Easy tutorial to sew a tunic or popover placket for the Kalle Shirtdress or your favourite shirt pattern.