Quilt to Size / Patterns / Half square triangle zigzag
Half square triangle zigzag quilt, throw size
9 by 12 blocks of 5", a 3" border, finished at 51" x 66". Half square triangles set into zigzags.
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This pattern, in your colors
- The cover with your quilt, colored as you set it here
- Step by step piecing for the half square triangle zigzag block, with the block diagram
- The quilt map: all 108 blocks by row and column
- Fabric, cutting, borders, backing and binding, to the inch
Throw size. One payment, no subscription. Measured twice: if a measurement is wrong, we correct it.
Fabric requirements
Based on 42" of usable width of fabric (WOF). Rounded up to the next 1/8 yard.
| Prints | 1 1/2 yd |
|---|---|
| Background | 1 1/2 yd |
| Border | 3/4 yd |
| Binding | 5/8 yd |
| Backing | 3 3/8 yd |
| Batting | 59" x 74" |
The block
5" finished (5 1/2" with seam allowances). 2 patches. Make 108.
Cutting chart
Cut strips across the width of fabric, then subcut. All measurements include 1/4" seam allowances.
Prints1 1/2 yd
Cut 8 strips 5 7/8" x WOF.
- Subcut 54 5 7/8" squares, cut once on the diagonal for half square triangles
Background1 1/2 yd
Cut 8 strips 5 7/8" x WOF.
- Subcut 54 5 7/8" squares, cut once on the diagonal for half square triangles
Border3/4 yd
Cut 6 strips 3 1/2" x WOF; join them end to end, then cut the four borders to length.
Binding5/8 yd
Cut 6 strips 2 1/2" x WOF; join them on the diagonal and press in half lengthwise.
Backing, binding, batting
Backing
3 3/8 yd of 42" fabric: 2 panels 59" long, seamed crosswise, for a 59" x 74" back (4" extra on every side for the longarm or your frame). Or 2 1/8 yd of 108" wide backing, no seams.
Binding
6 strips 2 1/2" x WOF, joined on the diagonal and folded in half: 234" around the quilt plus 12" for the corners and the join.
Batting
A piece at least 59" x 74".
Different size? Backing calculator ยท Binding calculator
On the notions wall
What this quilt takes beyond the fabric. Prices on Amazon as of October 22, 2026.
-
Warm & Natural cotton batting, twin 72" x 90"
Covers your 59" x 74" batting piece, 4" past the quilt on every side.
$33.70
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OLFA 45mm rotary cutter (RTY-2/DX)
The standard size for cutting strips up to six layers deep. The blade retracts when you let go.
$20.99
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OLFA 24" x 36" self-healing mat
Long enough to cut a strip folded once across the width of fabric in one pass.
$59.99
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Omnigrip 6" x 24" ruler
Every strip in the cutting chart is cut against a 24" ruler. The grip keeps it from sliding.
$26.47
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