ウエストと腰の辺りに継目が入ると安っぽく見えてしまい好みではなくなるので、この部分を確認したいです。
お店の見本のジャケットのパネル部分の継目のステッチならばそのままで結構です。
As I prefer not to have a cheap-looking seam near the waist and hips, I would like to confirm this part with you. If your store uses the stitching for the seam on the panel area of your jacket sample, that will be fine as it is.