These are bulk rolls. Also referred to as Tailor's Tape. These are available in 3/8" - 1/2" - or 5/8" wide. All Cotton.
3/8" Natural is put up on 250-yard rolls. 1/2" White is put up on 500-yard rolls. 5/8" Black & 5/8" white is put up 0n 250-yard rolls.