Hello! I want to buy DrDenim Treeger (waist 30"), but I don't know measurements of waist and thigh for this style. I wear Zara Regular Fit W30 an it fits me very well; also I wear Levis 511 W31, and it bigger, than i need. Please, tell me - DrDenim Treeger - It have sizing like Zara Jeans Regular, or bigger, or smaller? I need your help asap!