DMC Perle Cotton is a highly mercerized, non-divisible, lustrous 100% cotton thread. The twist of the thread gives it the perle description.The thread is combed, singed by flame and then double mercerized to give it a sheen. The thread is soft, silky, does not fluff or kink, and 100% colorfast. Pearl Cotton is a supple thread that provides wonderful volume and dimension to your embroidery. DMC Pearl Cotton Balls come in a 10 gram ball - approx 119m.