EASY TO CARRY AND STORAGE: Our dog ramps easy to set up and takedown. It can be folded into a compact size, it 's very convenient to storage and carry. ADJUSTABLE DESIGN: Tall dog ramp width16.9", open adjustable height from 27.76"-31.89", adjustable length from 43.3"-55". Closed measurement is 16.9" x 12.7" x 5.7". Note: for the side door, please make sure the openings must allow 2” of additional space to accommodate the width of the dog ramp. SAFETY：Our dog ramp with nonslip rubber coating surface to prevent pets from slipping when climbing stairs, offer double protect for our dogs. Best gift for our pets, protect their joint knee from injury.