Turning the Sigrid skirt into an A-line skirt is a quick and easy pattern hack that everyone can manage. You can choose between a moderate A-line skirt with darts (step 1) and a flared A-line skirt without darts (step 1-7). You will learn how to create volume in the skirt by closing darts. This method can be translated to other garments as well. The green wool skirt shows the moderate version and the flowered viscose skirt shows the flared version.
1. Trace the pattern in the size that is closest to your waist measurement. If your hip measurement is a bigger size, draw a line from the waist of the smaller size, towards the hip of the bigger size. Place a long, straight ruler from the waist to the hip and follow that line to the bottom hem of the pattern in a straight diagonal line. Measure the length of the skirt at the center front and mark the same length along the side. Draw a slightly curved line starting in a 90 degree angle from the side line, towards the straight bottom hem. Make sure that the length and angle of the side line is the same at both back and front pieces. If you have added a lot of volume, you should probably add some extra to the side of the facings as well, but for a moderate change of volume, it shouldn't be necessary to change the facings.
2. If you want to add more volume to the skirt, you can close the darts. Draw a straight line from the end point of the darts to the bottom hem of the pattern. Cut on the line from the bottom hem and up along one side of the dart. Now your pattern is in several pieces.
3. Place one side of the dart on top of the other side of the dart, as if they were one line. Make sure to align them completely along the waistline and the end point of the dart, before taping them together.
4. When you've closed the dart, a new triangle should have opened below the dart, leaving an opening along the bottom hem.
5 + 6. Use this method to close the darts of the back piece as well.
7. Draw slightly curved lines in the openings along the bottom hem.
Follow the same instructions for sewing the Sigrid skirt, but skip the darts if you've closed them.
Good luck with your pattern hacking!