What weight of weighted blanket should I buy?

The convention echoed across nearly every product listing and reviewer we read is roughly 10% of your body weight, give or take a pound. First-time users and lighter sleepers often start at the lower end (8%) for an easier adjustment, while people who want stronger deep-pressure stimulation push toward 12%. For a 150 lb adult that puts you in the 15 lb range, which is why 15 lb is the most heavily reviewed size on the market.