You will need: linen; a cord.
Attention! Fabric consumption varies depending on the size of garment. First of all, print out paper patterns and lay them out at the width of fabric/ knit you plan to use, to see how much fabric you will need.
When sewing the garment, pay attention to notches- they must coincide.
1. Front part - 2 details
2. Back part - 2 details
Sew side and inside leg seams. Press allowances apart, the, tack them.
Insert parts one into another, right sides together, sew the middle seam.
Make eyelets for the cord into front parts' waistband.
Press the one-piece facing to wrong side, turn the allowance under and edgestitch at the bend. Pull the cord.
Press the hem to wrong side, then topstitch.