6.5" Triangle Square Up Ruler

quilt in a day

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The most popular quilting ruler!
The 6 1/2 Triangle Square Up Ruler makes perfect half triangle squares and quarter triangle squares in sizes up to 6 1/2". Fully illustrated and detailed instructions are included. The ruler is marked in two colors for easy reading. Convenient 1/8", 1/4", 1/2" and 1" lines for precise measuring. The Ruler is made of heavy gauge acrylic and is laser precise. 

Find a video tutorial of how to use this ruler here.


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  • 5
    Makes half square triangles much easier

    Posted by Mary Lou Porteus on May 27th 2022

    Love having the right size ruler

  • 5
    6.5" square up ruler & 12.5 ruler

    Posted by Charlotte Bent on Feb 23rd 2021

    I bought these rulers for my SIL who is learning to quilt. I'm trying to spare her the frustration I had in the beginning, by showing her the little tricks that help, like squaring up your HSTs and blocks before assembling them. I love my QIAD fussy cut and square up rulers, and I know she will too! Thanks Melanie!

  • 5
    Quilt in a Day 6.5" Triangle Square Up Ruler

    Posted by Madlyn Stueland on May 9th 2020

    Product I've always wanted and need!!

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