I love The Quilted Pineapple curved rulers. I have this set and I use them quite a bit.
https://thequiltedpineapple.bigcarte...by-linda-hrcka
I also use a small straight ruler on every quilt that needs SITD as well as straight line ruler work. I prefer a small one as it is easier to handle. I have an HQ straight one that is 3" x 12" and it is too big, I never grab it. I use this one a lot:
https://www.quiltedjoy.com/product/m...cas-edge-ruler.
One word of advice for ruler work. If you are doing long runs of straight lines or cross hatching (like in this quilt:
Tealfalcon's Pumpkin Pie quilted by Feline Fanatic ) I strongly recommend marking in advance. It is amazing how quickly your nice straight line can get out of kilter when advancing the quilt.