Line loungewear pants
Size: XS (S) M (L) XL
Waist: 63 - 67 (68 - 76) 78 - 84 (85 - 94) 95 - 106 cm
Hip width: 86 (92) 100 (108) 117 cm
Leg length: 72 (73) 74 (75) 76 cm - or desired length
Gauge: 18 sts stockinette stitch = 10 cm
Needles: 4 mm and 5 mm (circular needles 60 and 80 cm)
Yarn: Tilia together with Peruvian - Filcolana, or other yarn with the same gauge
Skeins: 125 (125) 150 (150) 175 grams Tilia (25 g = 210 m)
450 (500) 550 (600) 650 grams Peruvian (50 g = 100 m)
The pants in the picture is made with  Peruvian color 977 together with Tilia color 101

Lines loungewear pants
The loungewear pants are worked top-down in stockinette stitch. You start with making a folded hem, and then work short rows and increases to get a nice fit, before decreasing when you make the legs. You finish the legs with folded hems, and make one long i-cord for your waist.
Make a swatch to make sure to have the right gauge. Notice that the gauge is given after the pants are rinsed.

Size guide
The waist measurements are approx 63 - 67 (68 - 76) 78 - 84 (85 - 94) 95 - 106 cm, and corresponds to european sizes XS (S) M (L) XL. The pants will adapt to your body, and it is important that the pants fit nicely around your bum. Because of this, I chose to knit myself a loungewear pants in size S. I measure 79 cm around my waist, and 90 cm around my hips. If you are unsure of which two sizes you should choose, I would recommend choosing the smallest. 
The pants are somewhat heavy, and will stretch a little. Therefore, make the legs 1,5 cm shorter than you would like the legs to be.