A good pocket for the front of trousers , skirts & garments with a waist seam.
Draft a straight pocket line on your garment front from waist line to side seam, add 0.5cm out from side seam at lowest point of pocket opening, this helps the pocket sit with a little ease and stops it pulling in the side seam when worn.
Trace off each pattern piece from the draft & add seam allowances.
Press under inner edges of facings & lay onto pocket bags.
front pocket bag 
back pocket bag
Topstitch in place.
With right sides together sew front pocket bag to garment front, press the seam allowances towards the pocket bag & edge stitch.
Press front pocket bag in place.
wrong side 
right side
Place back pocket bag lining up both lining bag edges.
front & back pocket bags together 
the side seams will not line up at this stage!
Sew the bags together, align the pocket edge with side seam, pin in position before attaching the rest of your garment.
Garment Construction 