BT21 minini MY ROOMMATE Pajama Pants #YellowThese adorable BT21 minini pajama pants are perfect for use as both casual loungewear or sleepwear. These cozy pants feature a cheerful yellow check pattern with BT21's faces! Details Official BT21 Merchandise Size Chart (Measured Straight Across Front of Pants): Size Waist Hip Centre Seam Length S 33cm 98cm 27. 5cm 87cm M 35cm 104cm 30cm 90cm L 40cm 112cm 29. 5cm 95cm Material: 100% cotton. Hand wash with mild detergent in cold water (below 30C);