GO! Half Square Triangle-4 1/2" Finished Square

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Quick Overview

Two half square triangles sewn together form a 4 1/2" finished square. Triangles are a basic building block in quilting. Arrange triangles in colorful combinations for great quilt designs. Combine with GO!

Compatible with these fabric cutters:

*Must use with GO! Die Adapter

GO!® Half Square-4 1/2" Finished Triangle (55397)

Use this GO! Half Square Triangle-4 1/2" Finished Square die to cut multiple triangles at once. It's compatible with the GO!, GO! Baby, GO! Big, and Studio fabric cutters, and makes clean, accurate cuts every time. The triangles cut with this die can be arranged to create a bevy of designs and combinations.

Use GO! dies with your GO! and GO! Baby Fabric Cutters to cut precise, accurate shapes in just seconds.

Features and Benefits:

  • Cut so much more in less time—Cut up to 6 layers of 100% cotton fabric at once
  • Easiest to use—Simply place die on cutter, then fabric and cutting mat on top
  • Get accurate cuts every time—No slipping rulers or mistakes
  • Create quilts you never thought you would—AccuQuilt makes cutting curvy classic quilt patterns a snap
  • Save fabric with Two Tone Foam—Get more out of your fabric by placing it only over the shape you want to cut
  • Safe to use—No blades come anywhere near your fingers
  • No more math—Geometric shapes are designed with an accurate 1/4" seam allowance in the design
  • Quilt more, clip less—No more clipping all those dog-eared corners
  • Quick and easy applique—Apply fusible web to fabric prior to cutting

Storage: Organize GO! dies with AccuQuilt GO! Die Storage Rack (55115).

Care & Maintenance: Use adhesive roller to clean lint and thread from dies. After each use, with the die pick provided with the cutter, remove any threads imbedded between blades and foam. It's normal for threads to get caught where blades meet in a die. Remove with tweezers or die pick. Die blades never need to be sharpened.

Die Tips:

  • With some fabrics, after cutting, a thread or two will remain where die blades meet. Snip threads with scissors.
  • Use cutting mats that matches size of each die.
  • For best results, cut with die blades running under roller at an angle. Do not cut with blades parallel to roller.
  • Blades on some dies are positioned at an angle. Align fabric to edge of shape, not edge of die board.
  • Some dies feature specially designed corners to aid in alignment and pre-cutting.
  • For fast applique, apply fusible web to fabrics, then cut shapes with dies.
  • Use good quality fabric to reduce fabric stretch.
  • It's always a good idea to test cut one shape before cutting many shapes to ensure fabric orientation is correct.

Warranty: AccuQuilt GO! dies are guaranteed for one year.

Details and Dimensions
Designer AccuQuilt
Compatible Fabric Cutter GO! Baby Fabric Cutter (55600), GO Fabric Cutter (55100S)
Cutting Mat/Plastic Required GO! Cutting Mat, 6 in. x 6 in. (15.2 cm x 15.2 cm) Item 55137
Cut Size Two 5"W x 5"H (13 cm x 13 cm) Triangles
Finished Size 4 1/2"W x 4 1/2"H (11 cm x 11 cm) Triangles
Die Board Size 6 in. x 6 in. (15.2 cm x 15.2 cm)
Item 55397
Weight in lbs. 1.56
Brand AccuQuilt
Warranty Limited One Year

In stock items will ship within 2 business days if ordered before 12:00 p.m. CST Mon-Fri. Most in-stock items will arrive at your U.S. address 3-8 business days (Ground Shipping) after your order is shipped.

Please note that deadlines for certain items, including Deluxe Cutting Cabinets (SKU 50903), are different than those of general merchandise as those items cannot be expedited. To make sure your gift selection can arrive on time, always check the Shipping tab located at the bottom of the specific product page.

The shipping time frames above apply to in-stock merchandise delivered to the contiguous United States, and does not include Alaska, Hawaii or APO/FPO addresses.

Studio Backordered items are currently out of stock, but are available for purchase.  Your entire order will ship with the backordered item(s) within 12 business days.

Pre-Order items will ship as indicated on the product page. Once shipped, your items will arrive at your U.S. address 3-8 business days (Ground Shipping) after your order is shipped.

Help & Guides

Customer Reviews

Overall Rating

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  • Charlene · 7/16/2015

    Great die

    I never attempted the triangles before getting this die. Now they are all the same size and it\'s great!!!!!!

  • PATRICIA · 7/9/2015

    Fantastic Die

    This die has helped me to get my pin wheels to match up perfect.

  • Barbara · 3/12/2015

    Love it

    I love this die. Makes sewing them together so easy.

  • Ann · 1/25/2015

    Great Die

    Makes cutting so fast and easy. Thank you!

  • Rhonda · 1/16/2015

    great die

    This one is very versatile. I love these dies!!!

  • Deborah · 1/16/2015

    Easy to use with traditional quilt patterns

    I was cutting 4 1/2' finished half square triangles for a traditional quilt pattern. It made it so easy for me to layer the background fabric with the dark fabric making them ready to sew at the machine. I'm lovin' my Go machine more and more every time I use it.

  • Leslie · 1/13/2015

    4 1/2 half square triangle

    1/2 square triangle AccuQuilt dies are among my favorite, always an accurate cut, when fabric is cut correctly, stitching is so much easier and the resulting square is true!

  • Mary · 1/1/2015

    Half-square die is my favorite

    Since using the Go! die for cutting half square triangles I enjoy sewing the half square unit together. It is very accurate!.

  • Janet · 11/21/2014


    I'm so happy to get even and exact triangles! Love it

  • Sharon · 12/26/2013

    Lots of Fun

    I just got my GO! last week and got this cutting die. I have had so much fun cutting out the triangle in a variety of prints and matching them up and finally making squares. I'm using up all the Christmas stash and will have another quilt for next year. The cutting die makes such a uniform, easy to sew piece. I just took up quilting 6 months ago and wish I knew about the GO! then. Thanks.