This is the fastest and easiest way to sew a sofa or armchair cushion. A typical cushion can be completed in about 30 minutes. This technique is called the "Box Corner Cushion" it is made from a single piece of fabric — no boxing, no zipper plaque, and no top and bottom plates. The Sailrite® Fabric Calculator does all the math and calculating for you! Simply enter your measurements and it will calculate the correct size and cutouts to make on your fabric piece. The cushion is also flippable, which makes it possible to get double the life out of your sofa cushions.

MAKE A SOFA CUSHION IN 30 MINUTES CHAPTERS:
Measuring Old Foam – 0:58 min
Cutting Fabric to Size – 4:31 min
Cutting Corner Notches – 7:02 min
Cutting Center Notches – 9:23 min
Sewing Zipper – 11:36 min
Sewing Sides – 16:14 min
Sewing Boxed Corners – 18:38 min
Inserting Foam – 24:43 min
Vent Grommets (optional) – 28:40 min
Materials List – 31:13 min

MATERIALS LIST:
Decor & Upholstery Fabric we used EverSoft Indoor/Outdoor Vinyl Fabric Item # 122226 https://www.sailrite.com/Fabrics/Home...
Seamstick 1/4" Basting Tape for Canvas & Upholstery (36Yds) Item # 122065 https://www.sailrite.com/Seamstick1...
YKK® Continuous Zipper Chain #5 Black (Coil Chain) Item # 104444 https://www.sailrite.com/YKKZipper5...
Thread from Sailrite we used V69 https://www.sailrite.com/Notions/Thre...
YKK® Zipper Slider #5 Metal Single Non‑Locking Pull Tab (Coil Chain)
Black Item # 122251 https://www.sailrite.com/YKKZipperS...
White Item # 122250 https://www.sailrite.com/YKKZipperS...
Cushion Wrap Silk Film 54" Item # 103933 https://www.sailrite.com/CushionWrap...
Vent Grommet Brass 3/4" Item # 120747 https://www.sailrite.com/VentGrommet...

TOOLS LIST:
Tape Measure 120 Inch Item # 102986 https://www.sailrite.com/TapeMeasure...
Gingher® Scissors Right Hand Lightweight 8" Item # 101017 https://www.sailrite.com/GingherScis...
Tempered Cutting Glass for Hotknife Item # 121915 https://www.sailrite.com/TemperedCut...
Sailrite® Edge Hotknife Package (110V) Item # 103800 https://www.sailrite.com/SailriteEdg...
Clear Acrylic Ruler 6" x 24" Item # 102400 https://www.sailrite.com/ClearAcryli...
Sailrite® Ultrafeed® LSZ‑1 PLUS Walking Foot Sewing Machine Item # 300602 https://www.sailrite.com/SailriteUlt...
Sailrite® Ultrafeed® Collapsible Sewing Table Item # 104821 https://www.sailrite.com/UltrafeedCo...
Sailrite® Drill Hole Cutter Set Item # 121825 https://www.sailrite.com/SailriteDri...
Vent Grommet Die Set 3/4" Item # 120749 https://www.sailrite.com/VentGrommet...