Get this Owens Corning R-15 Kraft Faced Fiberglass Insulation 16 O.C for 2×4 Wood Studs x 93 in. for delivery. Dimensions: 3-1/2 in. x 15 in. x 93 in., 7 pieces (67.81 sq. ft. per bag). Application: 2 in. x 4 in. walls (Interior/exterior/basement), floors. R-15 high-density insulation delivers 36% more R-value than standard R11 insulation in a 2 in. x 4 in. wall. GREENGUARD gold certified and verified to be formaldehyde free. Provides thermal performance and helps lower monthly heating/cooling costs. EcoTouch insulation helps control sound, add to bedrooms, home office, family room, utility room, kitchen and bathroom. Can be combined with FOAMULAR insulating sheathing to achieve greater R-value in exterior wall applications. Can be combined with FOAMULAR insulating sheathing to achieve greater R-value in exterior wall applications.