Ring: square boxing-style ring (typically 6m × 6m to 7m × 7m), 4 roped sides, padded canvas floor; Distinct from MMA cage — fighters bounce off ropes; Mandatory padded turnbuckle corners
Why people argue about this
People often assume that the size of the ring in Muay Thai matches is universally 6m x 6m, forgetting that there's a wide range from 6m × 6m to 7m × 7m specified by Section 3. They also misunderstand that the mandatory padded turnbuckle corners are a distinct feature specific to Muay Thai, not just an MMA thing.