I worked in a fabric store and have tried every product I could find to keep my rulers from slipping. Nothing worked until I found Grip Strips!
The Omnigrip 6 x 24 ruler is the standard, all-purpose ruler for cutting every shape when quilting - strips, borders and bias pieces. It can also be used to cut across joined strips and to cut geometric pieces for patchwork. Its generous length covers the width of fabric and the patented non-slip backing holds the ruler in place during cutting.
Omnigrip Non-Slip Quilter's Ruler, Size: 6 x 24 in.
Ruler Grip Tape – Piece N Quilt
Reviews on Grip Strips
Grip Strips by Guidelines4Quilting - Moore's Sewing
Grip Strips, Guidelines 4 Quilting #QR-GS
Grip Strips for quilting rulers to stop rulers from slipping
Ruler Combo, 55% OFF
Grip Strips - Strisce Aggrappanti 6pz
Guidelines4quilting - Quilt Ruler Upgrade Kit
Westalee Design Stable Tape
Guidelines4Quilting has upgraded their new Quilt Ruler Upgrade Kit. They now include Guide Lock Strips that make the long, 24 Fabric Guide lock into place just like the short, 12 Fabric Guide does. The long guide will now stay exactly on the measurement line you set it to no matter how much fabric it butts up against resulting in even faster, mistake proof and more consistently accurate alignment.
Guidelines4quilting Quilt Ruler Upgrade Kit
Omnigrid Invisi-Grip - 12-1/2x36
Package Includes Six 11¾ Crystal Clear Strips., Key Features:, Leaves No Sticky Residue, No More Slipping Rulers & Templates including Mask
Grip Strips by Guidelines4Quilting
ADERE Quilting Grip Tape - Non-Slip Adhesive Strips