25 sq Ft Increments - Premium 1/4" Acoustic Foam 5' x 5' or Longer SoundProofing/Sound Deadening Acoustical Foam Sheet Barrier - Closed Cell - Cross Linked Foam - Made in the USA! Sold in 5' Tall x 5' Long Increments - 2lb Density - Made in the USA! - Enter Qty 1 for 5' x 5', 1/4" Thick for excellent sound deadening STC Passes MVSS-302 Flame Tests (ultra-slow burning) High STC of 25-26 & excellent thermal retention properties For use in walls, ceilings, and floors (non-toxic) Qty 2 for 5' x 10', Qty 3 for 5' x 15', Qty 4 for 5' x 20' and so on.