Uploaded October 2025 | Updated September 2026, 2 weeks ago
Learn how to sew a clean, professional mitered corner on any obtuse angles (greater than 90°) with a double hem—perfect for canvas, marine-grade fabrics, or any fabric project. In this Sailrite tutorial, we address a viewer request (thanks, David!) and demonstrate the key differences from acute-angle miters (tutorial video for acute-angle corners can be found here: youtu.be/QtRo-48Fcd0).
The result? A greatly reduced bulk corner (fewer layers than traditional methods), and a gorgeous looking corner.
Acute Angle - Measures less than 90 degrees (but greater than 0°).
Obtuse Angle - Measures more than 90 degrees but less than 180 degrees.
Tutorial video for acute-angle corners can be found here: youtu.be/QtRo-48Fcd0?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
How to Sew 90 Degree Mitered Corners in Heavy Canvas: youtu.be/QhgcDrD32rc?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sattler® Marine Grade Tangerine 60" Fabric SKU: 124370 sailrite.com/search.php?query=sattler+marine+grade&utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sailrite® Clear Acrylic Ruler 6" x 24" - SKU: 102400 sailrite.com/Clear-Acrylic-Ruler-6-x-24?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Kai Stainless Steel Bent Handle 9" Scissors - SKU: 125661 sailrite.com/Stainless-Steel-9-Bent-Handle-Scissors?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Seamstick 3/8" Basting Tape for Canvas (36 yds.) - SKU: 122064 sailrite.com/Seamstick-3-8-Basting-Tape-for-Canvas-36-Yards?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sailrite® Bakelite Mallet 13 oz. - SKU: 123309 sailrite.com/Sailrite-Bakelite-Mallet-13-oz?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sailrite® Ultrafeed® LSZ Walking Foot Sewing Machine (110V) - SKU: 311602 sailrite.com/Sailrite-Ultrafeed-LSZ-Walking-Foot-Sewing-Machine-110V?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sailrite® Canvas Patterning Ruler SKU: 107040 sailrite.com/Sailrite-Canvas-Patterning-Ruler?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Learn how to sew a clean, professional mitered corner on any obtuse angles (greater than 90°) with a double hem—perfect for canvas, marine-grade fabrics, or any fabric project. In this Sailrite tutorial, we address a viewer request (thanks, David!) and demonstrate the key differences from acute-angle miters (tutorial video for acute-angle corners can be found here: youtu.be/QtRo-48Fcd0).
The result? A greatly reduced bulk corner (fewer layers than traditional methods), and a gorgeous looking corner.
Acute Angle - Measures less than 90 degrees (but greater than 0°).
Obtuse Angle - Measures more than 90 degrees but less than 180 degrees.
Tutorial video for acute-angle corners can be found here: youtu.be/QtRo-48Fcd0?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
How to Sew 90 Degree Mitered Corners in Heavy Canvas: youtu.be/QhgcDrD32rc?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sattler® Marine Grade Tangerine 60" Fabric SKU: 124370 sailrite.com/search.php?query=sattler+marine+grade&utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sailrite® Clear Acrylic Ruler 6" x 24" - SKU: 102400 sailrite.com/Clear-Acrylic-Ruler-6-x-24?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Kai Stainless Steel Bent Handle 9" Scissors - SKU: 125661 sailrite.com/Stainless-Steel-9-Bent-Handle-Scissors?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Seamstick 3/8" Basting Tape for Canvas (36 yds.) - SKU: 122064 sailrite.com/Seamstick-3-8-Basting-Tape-for-Canvas-36-Yards?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sailrite® Bakelite Mallet 13 oz. - SKU: 123309 sailrite.com/Sailrite-Bakelite-Mallet-13-oz?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sailrite® Ultrafeed® LSZ Walking Foot Sewing Machine (110V) - SKU: 311602 sailrite.com/Sailrite-Ultrafeed-LSZ-Walking-Foot-Sewing-Machine-110V?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
Sailrite® Canvas Patterning Ruler SKU: 107040 sailrite.com/Sailrite-Canvas-Patterning-Ruler?utm_source=DIY&utm_medium=Any+Angle+Mitered+Corner
