16", 18" and 20" diameter curves. Inside curve and outside curve match so that the ruler can be used on either side of the ruler foot. All markings are the same diameter, which allows for perfect echoing!
- 1/4" thick clear acrylic or 1/8" thick clear acrylic
- Engrave markings for easy to line up and consistent spacing
- Markings will not wear off
- Rounded edges
- Includes non-slip tape for additional resistance
- 1/4" thick can be used on longarm or domestic machine. 1/8" can be used on domestic machine with limited clearance behind ruler foot. (check out THIS YouTube video on this if you are unsure which thickness is best for you)