The Sure Fit 2 Piece Stretch Stripe Slipcover has elastic at the base of the furniture cover allows the cover to stay snug to the base of your furniture. The elastic is free-floating inside the hem of the cover to allow you to adjust fullness around the perimeter of your furniture. There are pleats at the inside back and arm intersection exist to minimize the amount of fabric you need to tuck. The arm front is relaxed at 8 Inches and will cover narrow arms, but will extend or stretch to cover up to 14 Inches arm widths. (Separate Zippered cushion cover)