1920s vintage handmade cotton thread lace, looks like hairpin type lace center with knit garter stitch borders, fairly stretchy, about 1" wide.
There's over 6 yards here - one piece about 90", two pieces about 48" each, two pieces about 20" each. 226" in all, it looks pretty easy to join these together!
It's unbleached crochet cotton thread, a sort of a pale flax shade - and this stuff has some spots and foxing, though it's never been used.