DOTTYMO

I have all sizes up to 151/2" . Never had the need for the larger one in 10 years of quilting, when I do will purchase one.

ManiacQuilter2

I seldom use my 15" ruler except for trimming up my quilts for binding like Tartan explain. I never bought a 20" square up ruler because I never make blocks that big.

DebraK

yep, the larger rulers are great for squaring off.

isewman

I would keep them both. You will use them both. I have a 12 1/2 & a 15" ruler and do use them. Yes keep them

Geri B

Doesnt that power cutting tute show using a 15" square up ruler......my theory - keep all rulers, templates

tessagin

Ditto what she said!

Abby'smom

I love the square rulers and have several but would love to have more of them, like your 20.5 inch or even a 15"--I have 2.5, 4.5, 6.5, 9.5, and 12.5, the smaller standard ones

nativetexan

I have a 20 1/2 ruler that has the sizes on it for side and corner triangles if setting blks on point. next ruler size down is 12 1/2 inches. I don't have an 18 so use the larger one if need to.

todiesmom

I bought the 15" ruler when I made a T-shirt quilt for my granddaughter but have really found that I use it a lot..I do QAYG blocks and the 15" size is perfect for squaring up these large blocks....I also use it for cutting out many of my totes bags as well as squaring them up...don't get rid of it...it will come in handy.

sparkys_mom

Absolutely! I'm terrible at squaring up blocks so I prefer having the correct size ruler for this task.