How to sew Trench coat buckle belt　トレンチコートのバックルベルトの縫い方

How to sew Trench coat buckle belt (with slide adjuster swivel of main fabric). (wie man einen Gürtel näht/comment coudre une ceinture/como costurar um cinto/cómo coser un cinturón/come cucire una cintura/как сшить ремень/كيف خياطة حزام) Cut the main fabric and interfacing as a square(bigger than a belt), then attach both with ironing heat in this time. As another way, cut the main and interfacing 1cm lager than the pattern (The amount of shrinkage with ironing heat), then attach both and cut according to