Recently I made an adult throw sized weighted blanket and thought I'd share some pictures! I made mine out of 2 yards of cotton (Baltic) and 2 yards of minky fabric. I weigh about 130 lbs, so I used 12 lbs of poly beads to fill my blanket (the recommendation is approximately 1 lb of blanket for every 10 lbs of body weight). I created 4"x4" sections to keep the beads in place. These blankets are used for therapeutic purposes. You should talk to your doctor/therapist to see if a weighted blanket is right for you. Please make sure you ask them about the recommended size and weight for you.
I used this tutorial from Craft Nector to make my blanket.