It’s a French curve ruler. IIRC the original French curve was used for drawing and drafting, having multiple curves and cutouts. This was developed with the graduations and solid shape specifically for sewing.
Comment on A tape measure is not accurate around curves
Diddlydee@feddit.uk 5 months ago
Why would this exist?
kindernacht@lemmy.world 5 months ago
Mickey7@lemmy.world 5 months ago
My research shows that it was originally invented to check the wild claims of those bragging that they were larger than they actually are
grte@lemmy.ca 5 months ago
Gag gift.