Big half-square triangle quilt pattern

9" half-square triangles, each pair made from one 10" layer cake square and one 10" background square trimmed to 9⅞", turned in fours so the prints make large diamonds.

The queen size is 89" × 107" with 99 blocks. Each size below has its own fabric list, cutting and backing, worked out for 42" fabric with ¼" seams, 10% extra and yardage rounded up to the next ¼ yard.

Big Half-Square Triangle quilt sizes
Size	Finished	Blocks	Top fabric
Crib	44" × 62"	24	10 yd
Throw	62" × 71"	42	11¼ yd
Twin	71" × 89"	63	12 yd
Full	80" × 98"	80	13 yd
Queen	89" × 107"	99	14 yd
King	107" × 107"	121	15½ yd

Big Half-Square Triangle quilt, queen size, 89" × 107" — Queen, 89" × 107"

Crib Big Half-Square Triangle quilt, 44" × 62"

24 blocks of 9", 6 rows of 4, 4" border.

Big Half-Square Triangle quilt, crib size, 44" × 62"

Fabric for the crib size
	Main, BindingCranberry floral	1 yd
	BackgroundWhite solid	1 yd
	Main14 fabrics, scrappy	½ yd each
	Main, BorderNavy sprig tree	1 yd
	Backing2 panels 52" long, seams across; or 1½ yd of 108" wide	3 yd
	Batting72" × 90"	Twin

Cutting

Main, Binding: Cut 1 strips 9⅞" × WOF. Subcut 1 squares 9⅞" for the half-square triangles. Cut 6 strips 2½" × WOF. Join into one 224" strip.
Background: Cut 3 strips 9⅞" × WOF. Subcut 12 squares 9⅞" for the half-square triangles.
Main, from each of the 14 fabrics: Cut 1 strips 9⅞" × WOF. Subcut 1 squares 9⅞" for the half-square triangles.
Main, Border: Cut 1 strips 9⅞" × WOF. Subcut 1 squares 9⅞" for the half-square triangles. Cut 5 strips 4½" × WOF. Join end to end. Cut 2 at 54½" and 2 at 44½".

Putting it together

Make 24 Half-square triangle blocks, 9" finished (9½" with seam allowance). That takes 24 half-square triangles.
Lay out the blocks in 6 rows of 4, turned as shown. Sew the rows, pressing the seams in opposite directions from row to row, then join the rows.
Add the 4" border: measure through the middle of the quilt, sew strips to the sides first, then to the top and bottom.
Layer the backing (52" × 70"), batting and top, quilt, and trim. Join the binding strips end to end, press them in half lengthwise and sew to the front.

Throw Big Half-Square Triangle quilt, 62" × 71"

42 blocks of 9", 7 rows of 6, 4" border.

Big Half-Square Triangle quilt, throw size, 62" × 71"

Fabric for the throw size
	Main, BindingCranberry floral	1 yd
	BackgroundWhite solid	2 yd
	Main14 fabrics, scrappy	½ yd each
	Main, BorderNavy sprig tree	1¼ yd
	Backing2 panels 70" long, seams across; or 2 yd of 108" wide	4 yd
	Batting72" × 90"	Twin

Cutting

Main, Binding: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Cut 7 strips 2½" × WOF. Join into one 278" strip.
Background: Cut 6 strips 9⅞" × WOF. Subcut 21 squares 9⅞" for the half-square triangles.
Main, from each of the 14 fabrics: Sage leaf: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Red floral: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Brown floral: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Cream rose sprig: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Cream gold sprig: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Gold tonal: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Navy gold floral: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Cream vine: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Gold paisley: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Evergreen vine: Cut 1 strips 9⅞" × WOF. Subcut 1 squares 9⅞" for the half-square triangles. Rust paisley: Cut 1 strips 9⅞" × WOF. Subcut 1 squares 9⅞" for the half-square triangles. Navy floral: Cut 1 strips 9⅞" × WOF. Subcut 1 squares 9⅞" for the half-square triangles. Red roses: Cut 1 strips 9⅞" × WOF. Subcut 1 squares 9⅞" for the half-square triangles. Dusty rose bouquet: Cut 1 strips 9⅞" × WOF. Subcut 1 squares 9⅞" for the half-square triangles.
Main, Border: Cut 1 strips 9⅞" × WOF. Subcut 1 squares 9⅞" for the half-square triangles. Cut 6 strips 4½" × WOF. Join end to end. Cut 2 at 63½" and 2 at 62½".

Putting it together

Make 42 Half-square triangle blocks, 9" finished (9½" with seam allowance). That takes 42 half-square triangles.
Lay out the blocks in 7 rows of 6, turned as shown. Sew the rows, pressing the seams in opposite directions from row to row, then join the rows.
Add the 4" border: measure through the middle of the quilt, sew strips to the sides first, then to the top and bottom.
Layer the backing (70" × 79"), batting and top, quilt, and trim. Join the binding strips end to end, press them in half lengthwise and sew to the front.

Twin Big Half-Square Triangle quilt, 71" × 89"

63 blocks of 9", 9 rows of 7, 4" border.

Big Half-Square Triangle quilt, twin size, 71" × 89"

Fabric for the twin size
	Main, BindingCranberry floral	1 yd
	BackgroundWhite solid	2½ yd
	Main14 fabrics, scrappy	½ yd each
	Main, BorderNavy sprig tree	1½ yd
	Backing2 panels 97" long, seams down; or 2¼ yd of 108" wide	5½ yd
	Batting90" × 108"	Queen

Cutting

Main, Binding: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cut 8 strips 2½" × WOF. Join into one 332" strip.
Background: Cut 8 strips 9⅞" × WOF. Subcut 32 squares 9⅞" for the half-square triangles.
Main, from each of the 14 fabrics: Sage leaf: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Red floral: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Brown floral: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Cream rose sprig: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cream gold sprig: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Gold tonal: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Navy gold floral: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Cream vine: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Gold paisley: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Evergreen vine: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Rust paisley: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Navy floral: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Red roses: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Dusty rose bouquet: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles.
Main, Border: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Cut 8 strips 4½" × WOF. Join end to end. Cut 2 at 81½" and 2 at 71½".

Putting it together

Make 63 Half-square triangle blocks, 9" finished (9½" with seam allowance). That takes 63 half-square triangles.
Lay out the blocks in 9 rows of 7, turned as shown. Sew the rows, pressing the seams in opposite directions from row to row, then join the rows.
Add the 4" border: measure through the middle of the quilt, sew strips to the sides first, then to the top and bottom.
Layer the backing (79" × 97"), batting and top, quilt, and trim. Join the binding strips end to end, press them in half lengthwise and sew to the front.

Full Big Half-Square Triangle quilt, 80" × 98"

80 blocks of 9", 10 rows of 8, 4" border.

Big Half-Square Triangle quilt, full size, 80" × 98"

Fabric for the full size
	Main, BindingCranberry floral	1 yd
	BackgroundWhite solid	3¼ yd
	Main14 fabrics, scrappy	½ yd each
	Main, BorderNavy sprig tree	1¾ yd
	Backing3 panels 88" long, seams across; or 2½ yd of 108" wide	7½ yd
	Batting90" × 108"	Queen

Cutting

Main, Binding: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cut 9 strips 2½" × WOF. Join into one 368" strip.
Background: Cut 10 strips 9⅞" × WOF. Subcut 40 squares 9⅞" for the half-square triangles.
Main, from each of the 14 fabrics: Sage leaf: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Red floral: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Brown floral: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cream rose sprig: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cream gold sprig: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Gold tonal: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Navy gold floral: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cream vine: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Gold paisley: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Evergreen vine: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Rust paisley: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Navy floral: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Red roses: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles. Dusty rose bouquet: Cut 1 strips 9⅞" × WOF. Subcut 2 squares 9⅞" for the half-square triangles.
Main, Border: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cut 9 strips 4½" × WOF. Join end to end. Cut 2 at 90½" and 2 at 80½".

Putting it together

Make 80 Half-square triangle blocks, 9" finished (9½" with seam allowance). That takes 80 half-square triangles.
Lay out the blocks in 10 rows of 8, turned as shown. Sew the rows, pressing the seams in opposite directions from row to row, then join the rows.
Add the 4" border: measure through the middle of the quilt, sew strips to the sides first, then to the top and bottom.
Layer the backing (88" × 106"), batting and top, quilt, and trim. Join the binding strips end to end, press them in half lengthwise and sew to the front.

Queen Big Half-Square Triangle quilt, 89" × 107"

99 blocks of 9", 11 rows of 9, 4" border.

Fabric for the queen size
	Main, BindingCranberry floral	1¼ yd
	BackgroundWhite solid	4 yd
	Main14 fabrics, scrappy	½ yd each
	Main, BorderNavy sprig tree	1¾ yd
	Backing3 panels 97" long, seams across; or 3¼ yd of 108" wide	8¼ yd
	Batting120" × 120"	King

Cutting

Main, Binding: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Cut 10 strips 2½" × WOF. Join into one 404" strip.
Background: Cut 13 strips 9⅞" × WOF. Subcut 50 squares 9⅞" for the half-square triangles.
Main, from each of the 14 fabrics: Sage leaf: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Red floral: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Brown floral: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cream rose sprig: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Cream gold sprig: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Gold tonal: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Navy gold floral: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cream vine: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Gold paisley: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Evergreen vine: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Rust paisley: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Navy floral: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Red roses: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Dusty rose bouquet: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles.
Main, Border: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cut 9 strips 4½" × WOF. Join end to end. Cut 2 at 99½" and 2 at 89½".

Putting it together

Make 99 Half-square triangle blocks, 9" finished (9½" with seam allowance). That takes 99 half-square triangles.
Lay out the blocks in 11 rows of 9, turned as shown. Sew the rows, pressing the seams in opposite directions from row to row, then join the rows.
Add the 4" border: measure through the middle of the quilt, sew strips to the sides first, then to the top and bottom.
Layer the backing (97" × 115"), batting and top, quilt, and trim. Join the binding strips end to end, press them in half lengthwise and sew to the front.

King Big Half-Square Triangle quilt, 107" × 107"

121 blocks of 9", 11 rows of 11, 4" border.

Big Half-Square Triangle quilt, king size, 107" × 107"

Fabric for the king size
	Main, BindingCranberry floral	1½ yd
	BackgroundWhite solid	5 yd
	Main14 fabrics, scrappy	7¼ yd total
	Main, BorderNavy sprig tree	1¾ yd
	Backing3 panels 115" long, seams across; or 6½ yd of 108" wide	9¾ yd
	Batting120" × 120"	King

Cutting

Main, Binding: Cut 2 strips 9⅞" × WOF. Subcut 5 squares 9⅞" for the half-square triangles. Cut 11 strips 2½" × WOF. Join into one 440" strip.
Background: Cut 16 strips 9⅞" × WOF. Subcut 61 squares 9⅞" for the half-square triangles.
Main, from each of the 14 fabrics: Sage leaf: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Red floral: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Brown floral: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Cream rose sprig: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Cream gold sprig: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Gold tonal: Cut 2 strips 9⅞" × WOF. Subcut 5 squares 9⅞" for the half-square triangles. Navy gold floral: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Cream vine: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Gold paisley: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Evergreen vine: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Rust paisley: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Navy floral: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Red roses: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles. Dusty rose bouquet: Cut 1 strips 9⅞" × WOF. Subcut 4 squares 9⅞" for the half-square triangles.
Main, Border: Cut 1 strips 9⅞" × WOF. Subcut 3 squares 9⅞" for the half-square triangles. Cut 10 strips 4½" × WOF. Join end to end. Cut 2 at 99½" and 2 at 107½".

Putting it together

Make 121 Half-square triangle blocks, 9" finished (9½" with seam allowance). That takes 121 half-square triangles.
Lay out the blocks in 11 rows of 11, turned as shown. Sew the rows, pressing the seams in opposite directions from row to row, then join the rows.
Add the 4" border: measure through the middle of the quilt, sew strips to the sides first, then to the top and bottom.
Layer the backing (115" × 115"), batting and top, quilt, and trim. Join the binding strips end to end, press them in half lengthwise and sew to the front.

Making the Big Half-Square Triangle quilt from precuts

The scrappy prints can come from layer cakes. Everything else, borders and binding included, comes from the yardage in the fabric list for each size.

Precuts for the Big Half-Square Triangle quilt
Size	Layer cake
Crib	12 squares, 1 layer cake
Throw	21 squares, 1 layer cake
Twin	32 squares, 1 layer cake
Full	40 squares, 1 layer cake
Queen	50 squares, 2 layer cakes
King	61 squares, 2 layer cakes

More quilts for each precut: layer cake quilt patterns.

See this quilt in your own fabric

With the cut list for your size, checked against your stash.

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