Trousers Tutorial, part 8 - Back Elastic

Cut an appropriate length of 2" elastic as required for comfortable wearing plus about 1" (and you know exactly how long you need it to be because you made a muslin test first, right?!?). 

For instance, I (Alex) have about a 37" waist and require an 18" long cut of elastic. 

Position the ends of your elastic so it overlaps the side seams by about ½" and its upper edge is flush with the trousers/waistband facing seam line. 

Then, using gold thread (it's okay if it's not metallic gold), sew the elastic to the back trousers through all layers (piping lip, back seam allowance, back trousers, and ⅝" trim).

Repeat for other side. 

PREVIOUS: Trousers Tutorial, part 7 - Close Back

NEXT: Trousers Tutorial, part 9 - Turn Facings Under