Cotton tape such as this is used for bookbinding, and is available in other several widths ~ 10~16~19~25mm. This listing is for starched tape that is
Book Binding Cotton Book Tape 13mm X 1 Metre
White Bookbinding Tape, White Cloth Book Repair Tape for Bookbinders, Semi-Transparent Hinging Tape, Craft Tape, 2 Inches by 45' Feet, Acid Free and Archival Safe Tape for Crafts & Book Repair : Office Products
3 BookGuard Premium Cloth Book Binding Repair Tape: 15 yds, Yellow
Cotton tape such as this is used for bookbinding, and is available in several other widths ~ 10~16~19~25mm ~ and for modest quantities in
Cotton bookbinding tape ~ unbleached ~ starched ~ 13mm (½) wide ~ sold in 33 metre rolls
13mm Biodegradable Organic Cotton Tape Undyed – Circular Factory
Bookbinding Tape, Black Cloth Book Repair Tape for Bookbinders, 2 Inches by 45 Feet
13mm Wide, 50m Roll, Purchase by the metre or by the roll (50m)
Cotton Tape 13mm
BookGuard 3 inch Premium Bookbinding Repair Cloth Tape, 15 Yard Roll, Navy Blue : Arts, Crafts & Sewing
White Bookbinding Tape, White Cloth Book Repair Tape for Bookbinders, Semi-Transparent Hinging Tape, Craft Tape, 2 Inches by 45' Feet, Acid Free and Archival Safe Tape for Crafts & Book Repair