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The Universal Flat Arm Unit Sewing Patterns
1,200+ Reviews

"We loved having the option to build our own custom sectional."

- Tammy W.

The Universal Flat Arm Unit Sewing Patterns

Regular price $45.00
Unit price per

  • Printed Pattern Set

  • Advanced Sewing Project

  • Designed for Built Best Fit

  • Ships in 1 Week
  • Includes full-size printed pattern pieces
  • Use these patterns to sew covers with your own fabric
  • Pattern only - fabric, foam, and inserts not included
DETAILS

What’s Included

  • Full-size printed sewing pattern pieces
  • Shipped in a protective tube

What You’ll Need

  • Your choice of fabric
  • Sewing machine and standard tools
  • Foam, frame, and inserts (not included)

How to Use

  • Purchase your unit (Armless, Wide Armless, Corner, Arm, etc.) from its product page
  • Select No Fabric (Frame + Fiber Pillow + Foam Cushion Only) in the dropdown
  • Use these patterns to create your own covers

Skill Level
Advanced - best for experienced sewists comfortable with upholstery-style projects

Designed for Built Best Fit
Patterns are drafted specifically for Built Best dimensions to achieve a clean, tailored fit

SHIPPING

Simple shipping. No surprises.
We ship pattern sets via standard ground to keep things affordable.

What to expect

  • Ships in 1 week
  • Arrives 2–4 business days after shipping via our carrier (UPS or FedEx, depending on location)
  • Tracking provided once it ships
    Carbon-neutral shipping

Delivery details
• Shipped in a protective tube to keep patterns intact
• Pattern sets are non-returnable and non-refundable

Frequently asked questions

  • Built Best is designed so when life happens, you replace parts, not the whole couch. Every component is available individually—frames, cushions, foam, pillows, and covers.

  • Shipping included:

    • Small frame pieces: $25
    • Large frame pieces: $40
    • Seat cushion: $75
    • Individual fabric pieces: $55
    • Back pillow (Armless / Small Corner): $55
    • Back pillow (Wide Armless / Large Corner): $65
    • Back foam (Armless / Small Corner): $55
    • Back foam (Wide Armless / Large Corner): $65

    No need to replace the whole couch over one worn piece.

  • If you’ve built a bookshelf, you’ve got this. Assembly takes about 45 minutes per unit. Instructions are written by real humans.

  • Yes. Everything ships flat-packed in boxes designed to fit through standard doors, staircases, and elevators.

  • Yes. All units connect with strong connector bolts that keep all units locked together but make it easy to undo the bolts and rearrange layouts when needed. We tested the bolts with all hands - 7 years old to 70 years old - to make sure they are ergonomic and feel easy to twist!

  • Assembled frames were tested to hold over 2,000 pounds. It was the same test that is used to approve furniture used on military bases - so, it's meant to be tough!

  • Yes. Unit fabrics are:

    • PFAS-free
    • Flame-retardant-free
    • OEKO-TEX® certified (or in process)
    • Stain-resistant via iClean™ technology
    • Fully machine-washable

    Cold wash. Gentle cycle. Hang dry.

    (Storage liners - sold separately - are wipeable, not machine washable.)

  • They’re water-resistant, not waterproof. Spills bead up if caught quickly, but standing liquid should be avoided.

  • While no fabric is fully pet-proof, many customers have great success with our performance velvets and weaves. Covers are removable and replaceable if life happens!

  • Nope. We believe in honest pricing every day. No inflated prices, no fake discounts — just fair pricing built around quality and longevity.