Skirts generally feature a belt. This helps to mark the waist and give your skirt a good fit. To ensure the belt's strength and perfect finishing, a thick, rigid interlining is used in addition.
Find out how to apply this interfacing and ensure a perfectly fitted belt.
A belt always goes on last, after the zipper if there is one. Also, you'll always cut the belt straight.
To cut the belt, draw a rectangle the length of your waistline + 6 cm. This extra margin will allow for ease (approx. 1.5 cm), seam values (2 cm) and if you wish to make an underlap (approx. 2.5 cm).
For belt width, use any width you like, double it and add 2 cm for seam allowance.
Then prepare your interfacing: it will have the same dimensions as your final belt, i.e. without the doubled measurements and without the 2 cm seam allowance.
Thermobond the interfacing to your belt.
Spin the belt onto your skirt, right sides together. If too much fabric protrudes, you'll cut it off later.
Stitch with a machine.
To get a good finish, remember to iron your seams as you go, on the reverse.
If you'd like to add a zipper or buttonhole, fold the unstitched edge 1 cm inwards, then topstitch or hand-stitch with sliding stitches.