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Thong

Narrow back strip, high leg. 3 pieces, drawn here for size 40.

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On the bodyFront and back
Front
Back
Pattern piecesWith seam allowance
FRONTBACKGUSSET LINING
Pieces3
  • Front1× on fold, 19 by 33 cm
  • Back1× on fold, 21 by 29 cm
  • Gusset lining1× on fold, 3 by 11 cm
MeasurementsSize 40
  • Waist76.0 cm
  • Hip101.0 cm
  • Waist to hip21.0 cm
  • Crotch depth26.9 cm
Block settingscm
  • Fabric stretch taken off10.0
  • Hip reduction per quarter2.0
  • Waist lowered at centre9.0
  • Waist lowered at side7.0
  • Side seam length3.0
  • Crotch length adjust-1.0
  • Crotch width3.5
  • Front / back waist tilt1.0
  • Front leg scoop6.0
  • Back leg scoop9.0
  • Back strip width1.5
  • Gusset length9.0
  • Rise adjust0.0
Fit checkscm
  • Finished waist73.9
  • Finished hip line82.9
  • Crotch length9.1
  • Leg opening71.9
  • Waist elastic68.4
  • Side seam front − back0.0
  • Crotch seam front − back0.0
How to sew6 steps
  1. Cut and markCut every piece with the grain arrow parallel to the selvedge. Transfer the notches and the marks with tailor's chalk or a short snip into the seam allowance.
  2. Set up for stretchUse a ballpoint or stretch needle and a narrow zigzag or the stretch stitch, or an overlocker. Seams in knit must stretch with the fabric.
  3. GussetLay the front and the back right sides together at the crotch, the gusset on one side and its lining on the other. Sew through all four layers, then roll the pieces through and sew the lining's other edge to the front the same way so all seams end up inside.
  4. Side seamsSew the side seams with the stretch stitch or the overlocker.
  5. Leg openingsZigzag lingerie elastic to the wrong side of each leg opening, stretching it a little at the front and more across the back. Fold it in and topstitch with a zigzag.
  6. WaistJoin the waist elastic into a ring, divide it and the waist into quarters, sew it on the same way, fold and topstitch.
Fabricsize 40
  • 110 cm wide0.9 m
  • 140 cm wide0.9 m
  • 150 cm wide0.9 m

Estimated from the pieces laid out with seam allowance, grain along the selvedge. Add more for matching checks or stripes. The editor shows the layout.