How to sew an envelope cushion cover
Front plus two overlapping backs.
Step by step
- Make the finished cover 0.4 in (1 cm) smaller than the insert; for a 18 in (45 cm) insert, cut the front 19 x 19 in (47 x 47 cm) (1.5 cm seams).
- Cut two back panels so they overlap by about 3 in (7.5 cm).
- Hem each back's opening edge: press 0.4 in (1 cm), then 0.8 in (2 cm), stitch.
- Lay front right side up, backs right side down on top, overlapping.
- Sew round all four sides with 0.6 in (1.5 cm) seams, pivoting at corners; backstitch over the overlap.
- Clip corners, neaten edges, turn, push out corners and press.
Watch
EASY DIY Envelope Cushion Cover Tutorial - Using just 1 piece of fabric! (4:04)
By Alanda Craft · Open on YouTube
Chosen from its title and channel: a 4-minute video from Alanda Craft on the same topic as this guide. Embedded from YouTube with credit; we don't host it. It only loads when you press play.
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Sources
All checked November 1, 2026. We read these; we did not test the products ourselves.