I have a few basic rulers in my sewing studio.ok maybe more than a few. Most of them are the typical sized square or rectangle, but from time to time I like using quilt templates
Pre-Cut Pattern PDF Bundle Sale - A Quilting Life
Quilting 101 - Patchwork Posse
Patti
Easy 2-at-a-Time Half-Square Triangles Tutorial
Sunnyside Diamond Zig-Zag Quilt « modafabrics
The 4 Best Quilting Rulers - Suzy Quilts
Specialty Quilting Rulers
How To Create a Tumbler Table Topper
Dresden Plate tutorial - The Crafty Quilter