Cedar Fair, the parent company of Knott's Berry Farm and 10 other amusement parks, offers very specific size requirements for “guests of larger size.” Cedar Fair warns that men over 6 foot 2 inches or 225 pounds with a 40-inch waistline or 52-inch chest “may not be accommodated on some of our rides.” The park operator ...

"Too fat" for a roller coaster is rarely about weight alone and is almost entirely about body proportions and restraint clearance. Ride manufacturers (like B&M or Intamin) design restraints to accommodate a specific range of chest, waist, and thigh dimensions to ensure the locking mechanism can click into a safe position. Generally, a waist size over 40 to 42 inches or a very broad chest can make it difficult to fit into "Over-the-Shoulder" (OTSR) restraints or tight lap bars. Many modern parks now provide "Test Seats" at the entrance of major rides so you can check the fit discreetly before waiting in a long line. Additionally, some coasters feature "Big Boy" seats (usually rows 4 or 5) which have an extra inch of clearance or dual-locking belts. If you can hear the restraint "click" at least once or twice, you are usually safe, but the final call is always made by the ride operator who must ensure the safety light on their console turns green, indicating a secure lock.