Waist too big stretch pants can be fixed with a quick and simple method.

I have some old favorites that I love, which I repair and patch.  One of my old favorites needs to be taken in at the waist, but rather than take band off, and/or take in at the sides, I attached some elastic at the back of the center back of the band.

Elastic should be about 3 cm (2 ¼") wide and cut into a 10 cm (4") stripe. (Or as wide as the band)

1. Place a dot in the center of the elastic.  This will be the center back seam position.  The elastic will be stretched from 5 cm (2") into 7.5 cm (3").
2. Place a dot at 7.5 cm (3") from the center back seam and secure the elastic.
3. Do the same on the opposite side.
4. Sew across the top, stretching as you go, then stitch the bottom.

When waist too big stretch pants, by using this method you can take them in around 5 cm (2").

If you want to have a neater appearance:

1. Unpick the band at the center back sufficient to insert the elastic.
2. Pin into place and stitch down.
3. Close the band

Happy altering

Judith aka genie