Check out this wonderful post At FitForArt. It contains
Faced w/ Optional Tab to secure
Classic Waistband with right side extension
Elastic Pull Up waist so comfortable, so easy to sew
Thank you Rae. <clap><clap> Excellent post! The above finishes are all free. The post also contains links to her available-for-purchase variations for a fly front, trouser details, and sporty details.