Use this lumbar stretcher 5 minutes a day and feel relief from lower back pain. The stretcher also helps with posture correction, sciatica, pinched nerves and more. There are 3 adjustable settings to customize the level of arch desired and therapeutic magnets that add to the arch support. The base measures 15"L x 9.8"W at the widest and 3.5"W at the narrowest and the 14.5"L x 8"W at one end and 9.25" at the opposite end. Assembly instructions and suggested exercises included. By Trademark Innovations.